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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: 1740894" data-attributes="member: 2736"><p>I have done this twice now and it provided me with some valuable information.</p><p></p><p>I had never seen/heard of it being done and am a big advocate of barrel Break in and just wanted to see if it would be an indication of how well the process improved the barrel bore and any other benefits.</p><p></p><p>This is where I did the test and the results. you should read all the way through the procedure or you can just skip to the test where I posted the results post #54.</p><p></p><p> <a href="https://www.longrangehunting.com/threads/new-barrel-break-in-and-cleaning-methods.160450/" target="_blank">https://www.longrangehunting.com/threads/new-barrel-break-in-and-cleaning-methods.160450/</a></p><p></p><p>I believe that velocity increases will vary depending on the cartridge and the barrel quality, Also the number of shots before it levels out. </p><p></p><p>Once it reaches the point that velocity levels out. I start load development. If I see a trend I then began tweaking the load to find it's potential. I also clean between every load tested be it 3 or 5 shots to start each load at the same place and barrel condition. I can find out later if the barrel likes a fouling shot, or will group with the first clean shot. I have several barrels that accuracy degrades between 5 and 7 shots</p><p>and some that will make it to 9 or 10. Beyond that, at some point accuracy will stabilize when the barrel becomes completely fouled and be very consistent.</p><p></p><p>These groups are not as good as the first, shot in a clean barrel but are very dependable if shooting matches that may require more than 50 shots without time to clean. Chronographing a new barrel give you a good start on many things in my opinion.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1740894, member: 2736"] I have done this twice now and it provided me with some valuable information. I had never seen/heard of it being done and am a big advocate of barrel Break in and just wanted to see if it would be an indication of how well the process improved the barrel bore and any other benefits. This is where I did the test and the results. you should read all the way through the procedure or you can just skip to the test where I posted the results post #54. [URL]https://www.longrangehunting.com/threads/new-barrel-break-in-and-cleaning-methods.160450/[/URL] I believe that velocity increases will vary depending on the cartridge and the barrel quality, Also the number of shots before it levels out. Once it reaches the point that velocity levels out. I start load development. If I see a trend I then began tweaking the load to find it's potential. I also clean between every load tested be it 3 or 5 shots to start each load at the same place and barrel condition. I can find out later if the barrel likes a fouling shot, or will group with the first clean shot. I have several barrels that accuracy degrades between 5 and 7 shots and some that will make it to 9 or 10. Beyond that, at some point accuracy will stabilize when the barrel becomes completely fouled and be very consistent. These groups are not as good as the first, shot in a clean barrel but are very dependable if shooting matches that may require more than 50 shots without time to clean. Chronographing a new barrel give you a good start on many things in my opinion. J E CUSTOM [/QUOTE]
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Collecting velocity data during barrel break-in?
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