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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Collecting velocity data during barrel break-in?
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<blockquote data-quote="J E Custom" data-source="post: 1741596" data-attributes="member: 2736"><p>I always do my break in using mid velocity loads to give the barrel a little time to adjust to the heat. I also consider this a good time to fire form to the chamber without hammering the case.</p><p></p><p>Even though the initial velocity is down from the desired velocity, with the increase in velocity, it can end up being a good load or at least a good place to start.</p><p></p><p>I have not seen the same thing that others have about needing 150 rounds to reach maximum accuracy. In fact, all the rifles that have been broken in correctly (At least in my opinion) have shot there best groups during or right after break in while the barrel is at its best condition. To be honest, I don't know if it was because of pristine rifling or the clean (Not worn throat), Or just the reduced loads, but maintaining the starting accuracy requires constant attention. </p><p></p><p>Each year i test the accuracy and compare it to the starting accuracy and have found that there has been very little degradation of the original group size. I just checked the accuracy less than a week ago for my primary deer hunting rifle. and after 16 years of shooting/hunting it is still just under 1/10th MOA (.097 5 shots at 100 yards, compared to the best when new (.054) and I'm not sure that it may be my getting older and just not seeing as well. Based on my records I have over 1100 rounds down the tube (Not really that many) but enough to see any change and so far It seems to be holding up good.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1741596, member: 2736"] I always do my break in using mid velocity loads to give the barrel a little time to adjust to the heat. I also consider this a good time to fire form to the chamber without hammering the case. Even though the initial velocity is down from the desired velocity, with the increase in velocity, it can end up being a good load or at least a good place to start. I have not seen the same thing that others have about needing 150 rounds to reach maximum accuracy. In fact, all the rifles that have been broken in correctly (At least in my opinion) have shot there best groups during or right after break in while the barrel is at its best condition. To be honest, I don't know if it was because of pristine rifling or the clean (Not worn throat), Or just the reduced loads, but maintaining the starting accuracy requires constant attention. Each year i test the accuracy and compare it to the starting accuracy and have found that there has been very little degradation of the original group size. I just checked the accuracy less than a week ago for my primary deer hunting rifle. and after 16 years of shooting/hunting it is still just under 1/10th MOA (.097 5 shots at 100 yards, compared to the best when new (.054) and I'm not sure that it may be my getting older and just not seeing as well. Based on my records I have over 1100 rounds down the tube (Not really that many) but enough to see any change and so far It seems to be holding up good. J E CUSTOM [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Collecting velocity data during barrel break-in?
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