Forums
New posts
Search forums
What's new
Articles
Latest reviews
Author list
Classifieds
Log in
Register
What's new
Search
Search
Search titles and first posts only
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Rifles, Reloading, Optics, Equipment
Reloading
brass weight sorting
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="Bart B" data-source="post: 560192" data-attributes="member: 5302"><p>I once shot two 15-shot test groups at 1000 yards with a .30-.338 Win. Mag. One group was with cases all exactly the same weight within 1/10th grain. The other 15 had a 5 grain spread; about 1% of their 235 grain or so case weight.</p><p></p><p>Both groups were fired with alternate shots; 1 with exact weight then one with high/low then 1 exact and so on. Did this to simulate what happens over 30 consecutive shots with each case weight type.</p><p></p><p>Both groups were about 6.5 inches in diameter; close enough to not make a difference. Shot dispersion in both were quite even. Both were horizontal from each other; bullet drop was the same.</p><p></p><p>Did the same test with a .308 Win. with a case weight of 171 abd 151 grain average weight. Same results; no difference in two 15-shot groups fired the same way.</p><p></p><p>So I'm convinced a 1% spread in case weight has virtually no effect on accuracy.</p><p></p><p>Talked with two primer company reps and they said there's a greater spread in accuracy between primers in a given lot than what a 1% spread in case weight has. </p><p></p><p>So, how does one sort primers as to which ones have the most uniform ignition properties?</p></blockquote><p></p>
[QUOTE="Bart B, post: 560192, member: 5302"] I once shot two 15-shot test groups at 1000 yards with a .30-.338 Win. Mag. One group was with cases all exactly the same weight within 1/10th grain. The other 15 had a 5 grain spread; about 1% of their 235 grain or so case weight. Both groups were fired with alternate shots; 1 with exact weight then one with high/low then 1 exact and so on. Did this to simulate what happens over 30 consecutive shots with each case weight type. Both groups were about 6.5 inches in diameter; close enough to not make a difference. Shot dispersion in both were quite even. Both were horizontal from each other; bullet drop was the same. Did the same test with a .308 Win. with a case weight of 171 abd 151 grain average weight. Same results; no difference in two 15-shot groups fired the same way. So I'm convinced a 1% spread in case weight has virtually no effect on accuracy. Talked with two primer company reps and they said there's a greater spread in accuracy between primers in a given lot than what a 1% spread in case weight has. So, how does one sort primers as to which ones have the most uniform ignition properties? [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
brass weight sorting
Top