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Hunting
Long Range Hunting & Shooting
Lapped with JB test
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<blockquote data-quote="tankgijohn72" data-source="post: 1897041" data-attributes="member: 77441"><p>Shoot it, it will speed up. Maybe not as much as you want, but it will go faster. As the barrel wears, the roughness in the throat increases the chamber pressure/MV. If you want more velocity try different powder or increase powder charge, leave the bore alone.</p><p></p><p>Also, don't recommend going heavy with the JB bore paste. Did some testing in lab environment with one of the bigger 30 cal cartridges. Every 100 rounds cleaned heavily with 30 strokes of JB. Velocity increased through 500 rounds even as bore dimensions both lands/grooves opened up (measured with laser bore mapper). Avg velocity increased even though bore dimensions were getting larger due to the JB bore paste regimen.</p></blockquote><p></p>
[QUOTE="tankgijohn72, post: 1897041, member: 77441"] Shoot it, it will speed up. Maybe not as much as you want, but it will go faster. As the barrel wears, the roughness in the throat increases the chamber pressure/MV. If you want more velocity try different powder or increase powder charge, leave the bore alone. Also, don't recommend going heavy with the JB bore paste. Did some testing in lab environment with one of the bigger 30 cal cartridges. Every 100 rounds cleaned heavily with 30 strokes of JB. Velocity increased through 500 rounds even as bore dimensions both lands/grooves opened up (measured with laser bore mapper). Avg velocity increased even though bore dimensions were getting larger due to the JB bore paste regimen. [/QUOTE]
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Lapped with JB test
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