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Rifles, Reloading, Optics, Equipment
Reloading
Barrel Break in
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<blockquote data-quote="Mikecr" data-source="post: 2765924" data-attributes="member: 1521"><p>I have not seen it.</p><p>But with most guns I've had, I did not replace a barrel with an identical spare of same chamber. So for each barrel I end up fully fire forming a batch of brass before load development, so this gets me close to 200 shots by then anyway.</p><p><em>[Now with all barrels, I break-in with 10shts of Tubb's Final Finish. And that's it for my break-in.]</em></p><p></p><p>With my latest gun I had several Border cut rifled barrels finished at once, with MY reamer set. As I burn through one, and spin another on, I have had no change in MV or accuracy. I'm nearing the accurate barrel life of the 3rd barrel now, using the same 50 pcs of brass. There was not a fire forming need after the first barrel, and I was able to stay with exactly the same load the whole time.</p><p>I did not see any change from a late breaking in/speeding up with any of these barrels. </p><p></p><p>One thing I've noticed is that many reloaders manage a relatively large batch of brass, and many of these same folks seem resistant to fully fire forming before load development. I can see why given 3 shots to fully FF a big batch of brass..</p><p>Well as brass is better fitting to a chamber, MV goes up.</p><p><u>So I wonder if these shooters are just seeing MV go up (described as barrels speeding up) as their brass finally reaches form.</u></p><p>I do not believe their barrels are speeding up, and I can think of no logical reason that barrels would.</p><p>Even at the step changes I see at an accurate barrel life point, MV doesn't change. Just accuracy.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 2765924, member: 1521"] I have not seen it. But with most guns I've had, I did not replace a barrel with an identical spare of same chamber. So for each barrel I end up fully fire forming a batch of brass before load development, so this gets me close to 200 shots by then anyway. [I][Now with all barrels, I break-in with 10shts of Tubb's Final Finish. And that's it for my break-in.][/I] With my latest gun I had several Border cut rifled barrels finished at once, with MY reamer set. As I burn through one, and spin another on, I have had no change in MV or accuracy. I'm nearing the accurate barrel life of the 3rd barrel now, using the same 50 pcs of brass. There was not a fire forming need after the first barrel, and I was able to stay with exactly the same load the whole time. I did not see any change from a late breaking in/speeding up with any of these barrels. One thing I've noticed is that many reloaders manage a relatively large batch of brass, and many of these same folks seem resistant to fully fire forming before load development. I can see why given 3 shots to fully FF a big batch of brass.. Well as brass is better fitting to a chamber, MV goes up. [U]So I wonder if these shooters are just seeing MV go up (described as barrels speeding up) as their brass finally reaches form.[/U] I do not believe their barrels are speeding up, and I can think of no logical reason that barrels would. Even at the step changes I see at an accurate barrel life point, MV doesn't change. Just accuracy. [/QUOTE]
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Reloading
Barrel Break in
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