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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Proof barrel slowing down.
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<blockquote data-quote="coyotezapper" data-source="post: 1449654" data-attributes="member: 20438"><p>Seat the bullet .010" longer and retest.</p><p></p><p>You mentioned that the accuracy was just ok. If after seating the bullet out longer and it doesn't change things increase your powder charge to get velocity back to original speed.</p><p></p><p>Copper fouling actually creates higher pressure and higher pressure results in higher velocity. Its not a copper fouling problem.</p><p></p><p>The barrel is not shot out after 400 rounds on a 300/28N.</p><p></p><p>A good solid powder node will allow you to not have to chase the lands as much as a narrow powder node does. By the sounds of what you are saying the powder node is very narrow and therefore sensitive to every little change.</p><p></p><p>You may also want to polish the throat every 200-300 rounds to extend throat life. .009" throat wear after 400 rounds is actually very little wear IMO.</p><p></p><p>Keep us posted.</p></blockquote><p></p>
[QUOTE="coyotezapper, post: 1449654, member: 20438"] Seat the bullet .010" longer and retest. You mentioned that the accuracy was just ok. If after seating the bullet out longer and it doesn't change things increase your powder charge to get velocity back to original speed. Copper fouling actually creates higher pressure and higher pressure results in higher velocity. Its not a copper fouling problem. The barrel is not shot out after 400 rounds on a 300/28N. A good solid powder node will allow you to not have to chase the lands as much as a narrow powder node does. By the sounds of what you are saying the powder node is very narrow and therefore sensitive to every little change. You may also want to polish the throat every 200-300 rounds to extend throat life. .009" throat wear after 400 rounds is actually very little wear IMO. Keep us posted. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Proof barrel slowing down.
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