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Rifles, Reloading, Optics, Equipment
Reloading
How much variation in shoulder from chamber to chamber?
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<blockquote data-quote="J E Custom" data-source="post: 1757509" data-attributes="member: 2736"><p>New brass is the best way to start reloading with, fired brass is harder and doesn't form as well and may be close enough that spring back may occur and the actual size may not be representative of the actual chamber dimensions. I always start with new brass and it is designated to that firearm only. I also neck turn for uniformity on new brass so it fire forms concentric (If it is thicker on one side, it will offset the bullet center buy that amount when fired).</p><p></p><p>I try not to size cases any more than necessary to chamber because the more you bump or size, the more you work harden the brass because it will return to the chamber size every time it fires. There are many ways to size cases and many reasons to do certain things, so each has to use the method best suited for their type of shooting.</p><p></p><p>Normally if you have to bump the shoulders, you are running high pressure loads that are stretching the action and compressing the bolt enough to allow the case to expand beyond the head space and Not return. some even load hard enough to get bolt lug set back (Not good).</p><p></p><p>In my opinion and based on the results I have seen, the better the case fits the chamber, and the more the loaded ammo is concentric,the better the accuracy. In long range hunting, one shot is the norm and precision means everything. If shooting matches or multiple targets rapidly then more sizing may be necessary for function.</p><p></p><p>You will get many opinions on sizing so you will have to decide which you will use.</p><p>I believe that good is not enough, best is only the benchmark for trying to do even better.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1757509, member: 2736"] New brass is the best way to start reloading with, fired brass is harder and doesn't form as well and may be close enough that spring back may occur and the actual size may not be representative of the actual chamber dimensions. I always start with new brass and it is designated to that firearm only. I also neck turn for uniformity on new brass so it fire forms concentric (If it is thicker on one side, it will offset the bullet center buy that amount when fired). I try not to size cases any more than necessary to chamber because the more you bump or size, the more you work harden the brass because it will return to the chamber size every time it fires. There are many ways to size cases and many reasons to do certain things, so each has to use the method best suited for their type of shooting. Normally if you have to bump the shoulders, you are running high pressure loads that are stretching the action and compressing the bolt enough to allow the case to expand beyond the head space and Not return. some even load hard enough to get bolt lug set back (Not good). In my opinion and based on the results I have seen, the better the case fits the chamber, and the more the loaded ammo is concentric,the better the accuracy. In long range hunting, one shot is the norm and precision means everything. If shooting matches or multiple targets rapidly then more sizing may be necessary for function. You will get many opinions on sizing so you will have to decide which you will use. I believe that good is not enough, best is only the benchmark for trying to do even better. J E CUSTOM [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
How much variation in shoulder from chamber to chamber?
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