Reloading Basics Bullets: Part 2
-
125
Comments
- Last updated: 19/11/2018
Once you have decided what type of bullet you are going to use, in terms of bullet construction and type, it is very important to match it to your particular gun. Usually, bullets are sold with most of the information you need shown on the box; calibre, diameter, weight, type etc. and this will generally be enough to ensure that they will work in your gun. One thing you will hardly ever see on the box, however, is the length of the bullet, and this is a vital factor when choosing the optimum bullets for your gun. This issue does make a vast difference to the performance of your finished ammo in your gun; so, is well worth some detailed consideration.
To get the very best performance from your gun, an often overlooked factor is the bullet length and its relationship to the rifling rate or ‘twist’ in your barrel. The rate of the twist is simply the number of inches of barrel over-which the rifling makes one complete turn, expressed for example as 1:10, which means that the rifling makes one turn in 10-inches of barrel. The rate of twist for your gun will be included in the documents that come with it or be available to find online. As a general rule, heavier bullets need a faster or ‘tighter’ twist rate to stabilise them. The principal behind the relationship between the rate of twist of the barrel and the weight of the bullets is this; heavier bullets, in a given calibre, are longer and so have more surface area in contact with the rifling. This means that they are affected differently by the rifling than the way lighter, shorter bullets are. Clearly, the entire length of a bullet is not in contact with the walls of the barrel, due to the taper towards the nose of almost all bullets; but, as the overall length of a bullet of a specific calibre is increased there is a general increase in the amount of surface area in contact with the barrel.
There is a way to calculate the rate of twist best suited to a particular bullet, using a calculation called the Greenhill formula, and this uses bullet length, rather than weight, as the variable factor. The calculation can also be used in reverse to calculate the best length of bullet for your gun and its rate of twist. All figures are in inches. To determine the best rate of twist, the formula divides 150 by the length of the bullet, expressed in calibres, and then multiplies the resulting number by the diameter of the bullet. The following example demonstrates how the calculation works: (See Greenhill Formula chart below.)
While a lot of theories do not always work in practice, this one does. It is the most effective and consistently reliable means of identifying the best bullet for a given gun. The biggest hurdle to overcome is actually getting the length of a given bullet without having to buy some first. Why bullet length does not get included on the packaging is a mystery; but, if you can get hold of this information, the calculation is quick and easy. One fantastic source of bullet lengths, as well as tons of other data for use when reloading, is the QuickLOAD software from JMS Arms, which lists literally thousands of bullet lengths. The same software can also be used to ‘design’ a load for your chosen bullet, allowing you to choose powders, charges etc. and calculate important stuff like pressure and velocity. More on QuickLOAD coming soon.
I have used this formula numerous times and on several different calibres. With only one exception, it has always allowed me to work out the bullet size that works the best in a given rifle, in terms of accuracy and consistency. The one exception is when I tried it on full wadcutter bullets in .357-calibre. The dimensions of the bullets generate worthless figures, but the bullets themselves are very accurate, one of the many anomalies or the reloading art! When I used the formula to work out the best bullet for my .308 Steyr, it showed that the best match to my gun would be a 190-grain bullet. This was a surprise, as I had been using a 145-grain bullet with acceptable results. Upping to various heavier bullets gradually, I ended up settling on a 180-grain PPU soft point with fantastic results. Coincidentally, the test target supplied with the rifle was produced using 190-grain bullets. I am not sure how long this formula has been around, but it certainly seems to have stood the test of time and still works well.
Reloading is a complicated art and keeping the variables in check is the key to success. This formula allows you to tick bullet size off the list of variables and find the best bullet for a particular gun. Despite having to run the calculation a few times, to get to a bullet length that best matches the twist of your barrel, and then finding a bullet of that precise length, it is a very useful and worthwhile tool. When you have found the right bullet, all you need to do is consult available reloading data, to find a suitable and safe powder charge for it. I definitely recommend that you give this a go, the results will optimise your bullet to rifle match and so improve the overall performance of your reloads. When you are starting reloading for the first time, it gives you a quick and easy way to start off with the right bullet.
Norman Clark Gunsmiths normanclarkgunsmith.co.uk
Henry Krank & Co henrykrank.com
JMS Arms jmsarms.com
1967 Spud Reloading Supplies 1967spud.com
Hannam’s Reloading Ltd hannamsreloading.com
125 Comments
bonus poker online <a href="https://gamblingcaso.com/">roulette online</a> cialis discount
Cwhvhp
31 Jan 2023 at 05:34 AMorder prednisone online cheap <a href="https://eamoxicillin.com/">cost amoxil</a> order amoxicillin 500mg generic
Thphtq
29 Jan 2023 at 06:03 PMmoney games <a href="https://ciasedpill.com/">cialis tadalafil 10mg</a> tadalafil 10mg usa
Qiruzw
26 Jan 2023 at 07:38 PMviagra 50mg <a href="https://edciaspill.com/">cheap tadalafil without prescription</a> cost tadalafil 10mg
Btwqbm
25 Jan 2023 at 06:12 AMfluconazole tablet <a href="https://afluconazole.top/">order fluconazole 200mg pill</a> sildenafil 100mg cheap
Tjwajt
23 Jan 2023 at 07:38 PMbuy cialis 5mg pill <a href="https://ampicillina.shop/">order ampicillin without prescription</a> buy ciprofloxacin 1000mg
Txyfhv
21 Jan 2023 at 06:58 PMtamsulosin online order <a href="https://baldactonebuy.com/">order aldactone 25mg online cheap</a> order aldactone online cheap
Xjrtof
20 Jan 2023 at 06:29 PMorder ranitidine pill <a href="https://acelebrexbuy.com/">buy celecoxib 200mg online</a> oral celebrex 100mg
Jnxqwx
19 Jan 2023 at 01:38 PMbaclofen uk <a href="https://ketorolacp.store/">toradol us</a> order toradol online
Bpcutm
17 Jan 2023 at 06:49 PMbuy losartan generic <a href="https://losartan.top/">losartan tablet</a> order topamax 200mg generic
Nhztpb
17 Jan 2023 at 03:53 AMbuy orlistat online <a href="https://zacyclovir.com/">acyclovir 800mg price</a> order acyclovir 400mg sale
Jacbrk
14 Jan 2023 at 05:07 AMorder tadalafil 40mg generic <a href="https://tadalafilfu.com/">buy cialis 5mg online</a> viagra 50mg pills
Ynbeky
11 Jan 2023 at 02:23 PMbuy levitra online <a href="https://aglyrica.store/">order lyrica 75mg without prescription</a> buy methylprednisolone 4 mg
Rvjikh
09 Jan 2023 at 06:42 AMbuy amlodipine 5mg online <a href="https://edytadal.online/">tadalafil 5mg for sale</a> cialis 20mg
Uqnkvn
04 Jan 2023 at 04:50 AMbuy zyprexa 10mg generic <a href="https://aplanzapine.com/">zyprexa 10mg usa</a> diovan usa
Cjhodp
03 Jan 2023 at 04:26 PMbuy sporanox without prescription <a href="https://aitraconazole.com/">order sporanox 100 mg online</a> cost tindamax 300mg
Gstojd
02 Jan 2023 at 12:15 PMfurosemide generic <a href="https://hdoxycycline.com/">order doxycycline 200mg pill</a> plaquenil 200mg ca
Tglpkj
31 Dec 2022 at 05:19 PMcost cialis 20mg <a href="https://cialerec.com/">cost of cialis</a> sildenafil 100mg england
Uvzvlw
31 Dec 2022 at 04:19 AMorder medroxyprogesterone 10mg <a href="https://gnprovere.com/">medroxyprogesterone 5mg over the counter</a> buy periactin 4 mg online cheap
Casrxj
27 Dec 2022 at 07:45 AMavlosulfon 100 mg over the counter <a href="https://buynifedipin.com/">adalat uk</a> aceon 4mg over the counter
Zlqsgf
26 Dec 2022 at 03:43 PMorder cialis 5mg without prescription <a href="https://buyclspi.com/">Cialis for order</a> sildenafil citrate
Tndknd
24 Dec 2022 at 11:28 PMcost molnupiravir <a href="https://amolnupiravir.com/">molnunat price</a> buy prevacid 30mg pills
Ojiikc
23 Dec 2022 at 05:33 AMimdur 40mg tablet <a href="https://getisosorbide.com/">buy imdur 20mg for sale</a> telmisartan 80mg brand
Ifrefn
21 Dec 2022 at 09:08 PMfosamax 35mg pills <a href="https://gnfamotidine.com/">order pepcid 40mg without prescription</a> pepcid 20mg brand
Yjasqu
19 Dec 2022 at 11:24 PMorder terazosin generic <a href="https://sulfasalazins.com/">order azulfidine 500mg generic</a> sulfasalazine 500mg canada
Vbdlrc
19 Dec 2022 at 12:50 PMbuspar 5mg drug <a href="https://buydilanti.com/">dilantin 100mg drug</a> ditropan 2.5mg pills
Foqxgh
18 Dec 2022 at 06:53 PMcatapres 0.1mg for sale <a href="https://getiotropium.com/">oral spiriva 9 mcg</a> buy generic spiriva
Zgzwfq
18 Dec 2022 at 08:56 AMdoxycycline 200mg usa <a href="https://doxycyclinege.com/">purchase doxycycline without prescription</a> order furosemide online cheap
Kpnhnu
17 Dec 2022 at 05:41 AMbuy provigil 100mg pills <a href="https://acetazolamider.com/">purchase diamox online cheap</a> diamox 250 mg generic
Umxhbu
16 Dec 2022 at 05:37 PMpurchase isotretinoin pills <a href="https://amoxicilx.com/">amoxicillin 1000mg for sale</a> ivermectin 3 mg tablet
Ljzsso
16 Dec 2022 at 02:45 AMbuy deltasone 5mg pills <a href="https://getciax.com/">price of cialis</a> sildenafil 20mg
Oilhhs
14 Dec 2022 at 10:28 AMpharmacie en ligne cialis 5mg <a href="https://tadalfr.com/">generique tadalafil 40mg</a> viagra 200mg generique
Gvxkcv
14 Dec 2022 at 01:14 AMampicillin ca <a href="https://gampicil.com/">buy ampicillin 500mg pills</a> erythromycin online buy
Phtkfb
05 Dec 2022 at 05:02 AMspironolactone us <a href="https://galdacton.com/">order spironolactone 25mg pill</a> fluconazole pills
Gcdgff
03 Dec 2022 at 09:50 PMcolchicine 0.5mg generic <a href="https://gnindera.com/">inderal order</a> methotrexate 5mg generic
Yftpdp
29 Nov 2022 at 06:54 AMbaclofen without prescription <a href="https://aflexecl.com/">order cyclobenzaprine generic</a> sildenafil overnight
Yfufgb
24 Nov 2022 at 03:51 PMrosuvastatin 10mg without prescription <a href="https://plmotiliu.com/">motilium generic</a> tetracycline 500mg drug
Qypnzr
22 Nov 2022 at 08:13 PMorder misoprostol generic <a href="https://bcytopc.com/">order cytotec 200mcg generic</a> cheap levothyroxine for sale
Unjvte
18 Nov 2022 at 11:39 PMorder lopressor online <a href="https://metoprolpol.com/">metoprolol canada</a> methylprednisolone 16 mg pills
Hhtwjz
14 Nov 2022 at 05:34 PMlisinopril 2.5mg pill <a href="https://pisinopril.com/">lisinopril 10mg us</a> tadalafil 20mg us
Syarlv
13 Nov 2022 at 02:28 PMlipitor 20mg usa <a href="https://seviaged.com/">viagra sildenafil 200mg</a> generic viagra 150mg
Tbgxep
12 Nov 2022 at 11:52 AMfurosemide over the counter <a href="https://doxycycin.com/">doxycycline 100mg uk</a> cost of stromectol
Zjywnl
10 Nov 2022 at 01:50 AMfenofibrate cheap <a href="https://trileptn.com/">order oxcarbazepine 300mg sale</a> uroxatral 10mg price
Rtqsbv
31 Oct 2022 at 02:02 PMpurchase furadantin online cheap <a href="https://motriln.com/">order ibuprofen sale</a> motrin 600mg cost
Aznlpp
29 Oct 2022 at 01:22 AMcoreg us <a href="https://elavipl.com/">amitriptyline 50mg us</a> amitriptyline 10mg oral
Aengdg
27 Oct 2022 at 08:36 PMorder mesalamine generic <a href="https://cordaronal.com/">buy cordarone 100mg for sale</a> amiodarone medication
Uquvyy
26 Oct 2022 at 06:23 PMclarinex without prescription <a href="https://diltials.com/">diltiazem buy online</a> loratadine over the counter
Bnrkxu
23 Oct 2022 at 02:31 PMbuy lisinopril 10mg generic <a href="https://omeprazx.com/">prilosec 20mg usa</a> buy atenolol for sale
Otlyxo
21 Oct 2022 at 05:42 PMbuy cialis 40mg pill <a href="https://edfstp.com/">top erection pills</a> tadalafil 20mg price
Ewhblj
19 Oct 2022 at 09:17 AMbuy fildena generic <a href="https://abudesonide.com/">cost rhinocort</a> order budesonide without prescription
Mrjqwo
16 Oct 2022 at 02:23 AMmethotrexate 10mg drug <a href="https://alosartan.com/">buy losartan 25mg sale</a> losartan 50mg price
Imgtht
02 Oct 2022 at 06:13 AMorder motrin online cheap <a href="https://paroxetinex.com/">paxil 10mg cost</a> buy calcitriol 0.25mg for sale
Aectid
29 Sep 2022 at 10:41 AMbuy allegra 120mg online cheap <a href="https://buyazelastinex.com/">astelin 10ml sale</a> panadol 500mg cheap
Ietmib
17 Sep 2022 at 04:00 AMorder zovirax without prescription <a href="https://buyallopurin.com/">zyloprim us</a> perindopril medication
Erxjjg
15 Sep 2022 at 06:07 PMbuy imuran for sale <a href="https://nifedipinel.com/">nifedipine tablet</a> oral pyridium
Wabuto
06 Sep 2022 at 05:12 AMazathioprine for sale online <a href="https://viaformen.com/">sildenafil in usa</a> telmisartan price
Nixycw
03 Sep 2022 at 10:14 PMbuy essay paper <a href="https://bscialpl.com/">cialis drug</a> cheap tadalafil sale
Epvtvv
02 Sep 2022 at 07:00 PMbest online casino real money <a href="https://hapstudies.com/">good academic writing</a> write my essay help
Crypoe
31 Aug 2022 at 09:25 PMbuy xenical 60mg pill <a href="https://xorlistat.com/">order orlistat pill</a> lioresal buy online
Zfxqnh
28 Aug 2022 at 07:39 AMcasino online gambling <a href="https://slotscasgmxx.com/">free online slots</a> purchase misoprostol generic
Ilkxhj
27 Aug 2022 at 03:01 AMindomethacin tablet <a href="https://cefiximes.com/">order cefixime 200mg online cheap</a> order amoxicillin 500mg online
Wzzwtr
18 Aug 2022 at 11:55 PMivermectin 6 <a href="https://prazosinxl.com/">minipress pill</a> retin cream for sale
Yajzxs
16 Aug 2022 at 07:39 AMorder viagra 100mg generic <a href="https://rtsildenafil.com/">pfizer viagra</a> cialis next day delivery
Osxfqd
15 Aug 2022 at 01:21 AMpurchase metronidazole generic <a href="https://augmentiln.com/">buy augmentin 625mg sale</a> order metformin 1000mg pill
Qqblax
10 Aug 2022 at 11:48 PMpurchase azithromycin generic <a href="https://prednisolonel.com/">buy prednisolone online</a> order metformin 500mg online cheap
Slffbu
09 Aug 2022 at 04:39 PMtadalafil 10mg over the counter <a href="https://provipill.com/">modafinil online</a> purchase sildenafil without prescription
Zetlac
08 Aug 2022 at 10:24 AMbuy generic fluconazole <a href="https://ciprotbs.com/">cipro us</a> sildenafil 25 mg
Sitciq
07 Aug 2022 at 03:58 AMorder ondansetron online <a href="https://zofrapl.com/">purchase zofran for sale</a> buy finasteride 5mg generic
Jzeddg
05 Aug 2022 at 08:37 AMbuy zantac online <a href="https://tamsulosinl.com/">brand flomax</a> flomax pill
Wgoblr
04 Aug 2022 at 01:58 AMcialis cost <a href="https://levofloxacinl.com/">buy levofloxacin 500mg for sale</a> dutasteride oral
Rfxmwm
02 Aug 2022 at 07:30 PMesomeprazole 20mg usa <a href="https://phenergpl.com/">order phenergan online</a> order generic tadalafil 40mg
Axbjtt
01 Aug 2022 at 12:32 PMbuy sildalis without prescription <a href="https://lamotriginep.com/">buy lamotrigine 50mg generic</a> losartan uk
Manblr
31 Jul 2022 at 05:11 AMorder isotretinoin pill <a href="https://suhagrapls.com/">buy suhagra sale</a> order sildenafil 100mg generic
Qsymmw
29 Jul 2022 at 05:53 PMsildenafil over the counter <a href="https://edspill.com/">where to buy otc ed pills</a> deltasone for sale online
Ltcrpa
28 Jul 2022 at 10:26 AMmethotrexate 2.5mg uk <a href="https://metoclopramy.com/">brand reglan 10mg</a> reglan 10mg cheap
Epbzbw
27 Jul 2022 at 02:36 AMorder flexeril sale <a href="https://clopidogrely.com/">buy clopidogrel 75mg without prescription</a> cost clopidogrel
Brjfco
25 Jul 2022 at 07:05 PMzetia price <a href="https://domperidonebc.com/">domperidone drug</a> motilium price
Pwotst
24 Jul 2022 at 02:40 AMorder sildenafil 50mg <a href="https://rosuvastans.com/">rosuvastatin 20mg pills</a> buy tadalafil 40mg online cheap
Gwauxn
22 Jul 2022 at 05:06 AMpriligy pill <a href="https://diltiazemns.com/">generic diltiazem 180mg</a> allopurinol 100mg without prescription
Ranxja
20 Jul 2022 at 11:54 PMbaricitinib 4mg price - <a href="https://metforminf.com/">metformin 1000mg sale</a> lisinopril 10mg generic
Izsjhh
18 Jul 2022 at 03:13 PMbrand hydroxychloroquine - <a href="https://viagsildef.com/">sildenafil overnight</a> cenforce 50mg canada
Guywea
16 Jul 2022 at 08:44 AMgabapentin without prescription - <a href="https://gdoxycycline.com/">purchase stromectol pill</a> covid and ivermectin
Iikiyr
14 Jul 2022 at 09:59 PMdeltasone 10mg usa - <a href="https://isotretinoint.com/">buy accutane 40mg pill</a> buy prednisolone 5mg sale
Jtyopt
13 Jul 2022 at 03:49 AMtop ed drugs - <a href="https://tadalafilsde.com/">cialis 10mg generika rezeptfrei kaufen</a> sildenafil generika rezeptfrei kaufen
Lgixwk
11 Jul 2022 at 05:06 PMfildena cheap - <a href="https://cefuroximel.com/">purchase cefuroxime generic</a> purchase viagra pill
Tgihqo
10 Jul 2022 at 07:30 AMorder metronidazole 400mg - <a href="https://metronidazoled.com/">buy metronidazole online cheap</a> buy cephalexin for sale
Bqczrw
09 Jul 2022 at 03:08 AMfinasteride 1mg over the counter - <a href="https://finasterider.com/">buy finasteride 5mg sale</a> ciprofloxacin 500mg without prescription
Bsvflt
07 Jul 2022 at 07:28 PMbuy zofran 8mg without prescription - <a href="https://valacyclovirs.com/">order valacyclovir online cheap</a> order generic valacyclovir 500mg
Wtcowq
05 Jul 2022 at 10:31 AMtadalafil 20mg brand - <a href="https://tadalafilpr.com/">cheap tadalafil generic</a> buy generic flomax
Gottke
03 Jul 2022 at 11:47 AMlevofloxacin online - <a href="https://dutasterider.com/">avodart 0.5mg brand</a> tadalafil 10mg tablet
Bmrnoj
01 Jul 2022 at 10:39 PMcozaar for sale online - <a href="https://esomeprazolen.com/">buy nexium 20mg online</a> promethazine 25mg cost
Evhtwl
29 Jun 2022 at 07:20 PMclopidogrel us - <a href="https://tmethotrexate.com/">cheap methotrexate 2.5mg</a> cheap metoclopramide
Glicse
28 Jun 2022 at 02:36 AMorder cyclobenzaprine without prescription - <a href="https://rcolchicine.com/">buy gloperba for sale</a> buy inderal 10mg without prescription
Izscvy
26 Jun 2022 at 09:12 AMorder isotretinoin sale - <a href="https://risotretinoin.com/">accutane over the counter</a> buy generic tetracycline 500mg
Hezaga
24 Jun 2022 at 04:15 PMbuy provigil online - <a href="https://rerectpill.com/">best ed pills</a> budesonide tablet
Ehclyl
22 Jun 2022 at 06:30 PMviagra 100mg tablet - <a href="https://rsildenafilr.com/">sildenafil without a doctor’s prescription</a> cheap tadalafil 5mg
Gxtbef
21 Jun 2022 at 06:25 AMbuy cenforce 50mg generic - <a href="https://xdomperidone.com/">domperidone 10mg generic</a> motilium 10mg price
Uiqtxk
19 Jun 2022 at 09:35 PMorder tadalafil 20mg online - <a href="https://edtadalsfil.com/">cheap cialis online</a> viagra 100mg price
Zhecap
14 Jun 2022 at 09:31 PMorder synthroid 150mcg for sale - <a href="https://desloratadi.store/">buy desloratadine pill</a> cheap plaquenil
Tvuywj
13 Jun 2022 at 10:13 AMbuy ventolin inhalator generic - <a href="https://essayslw.com/">buying a term paper</a> order dapoxetine 60mg pill
Hracqz
11 Jun 2022 at 10:36 PM