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Rifles, Reloading, Optics, Equipment
Reloading
neck trimming,tension,concentric,will it help?
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<blockquote data-quote="AJ Peacock" data-source="post: 174639" data-attributes="member: 4885"><p>With factory chambers, neck trimming won't buy you too much if you have good brass. I typically only trim .001" or less off the high side of a lot of brass and call it good. Making the brass thinner means it will be working more each time you shoot and resize it (shorter brass life). If the brass is not consistent, then it will start to bend a little each time it is fired/cooled. I use the concentricity gauge on my fired rounds and toss the ones that are starting to bend (turn into a banana) by more than .001" (I mark them and use them as foulers etc.). The bending is from one side of the brass being thicker than the other side (so it stretches/rebounds differently). Turning the necks to consistent thickness, only fixes the necks. The body of the case usually mimics the inconsistency.</p><p></p><p>4-5" repeatable groups at nearly 700yds is pretty darn good, how much better do you want to be? Shrinking the groups by 1/2 would be a lot!</p><p></p><p>AJ</p></blockquote><p></p>
[QUOTE="AJ Peacock, post: 174639, member: 4885"] With factory chambers, neck trimming won't buy you too much if you have good brass. I typically only trim .001" or less off the high side of a lot of brass and call it good. Making the brass thinner means it will be working more each time you shoot and resize it (shorter brass life). If the brass is not consistent, then it will start to bend a little each time it is fired/cooled. I use the concentricity gauge on my fired rounds and toss the ones that are starting to bend (turn into a banana) by more than .001" (I mark them and use them as foulers etc.). The bending is from one side of the brass being thicker than the other side (so it stretches/rebounds differently). Turning the necks to consistent thickness, only fixes the necks. The body of the case usually mimics the inconsistency. 4-5" repeatable groups at nearly 700yds is pretty darn good, how much better do you want to be? Shrinking the groups by 1/2 would be a lot! AJ [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
neck trimming,tension,concentric,will it help?
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