confused with 22 barrel to round tolerances
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Old 01-20-2011, 04:48 AM   #1
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Default confused with 22 barrel to round tolerances

hi ive done a bit of research and found that the round is slightly larger than the crest of the twist and is size for size or a tiny size smaller that the valley
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Old 01-21-2011, 08:00 PM   #2
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Not sure exactly what you are asking (too long on an airplane today and I am a bit punchy)- however, IN GENERAL- bullets fit themselves to the bore when fired (within limits) Process is sometimes called obturation- the softer metal is squeezed to fit snugly, and be gripped by the rifling. otherwise propellant gasses would blow past the bullet.

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Old 01-22-2011, 03:47 AM   #3
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Little confused here as well, and I have not been up in Seward's Folly.

C3 is correct as usual. The diameter of the bullet is a tad larger than the diameter of the rifling on a barrel. That way, the rifiling can grip the softer bullet and spin the bullet to stablize it during flight. The groove diameter is nearly equal to the bullet diameter so gasses won't just blow by the bullet.

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Old 01-22-2011, 03:08 PM   #4
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cool thank you thats the answer i wanted
ive worked in the engineering trade for a bit and learned about tolerances and it just seemed a bit weird that the bullet was bigger than the id of the bore but makes sense because of its explosive power

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Old 01-22-2011, 03:12 PM   #5
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how have you made 9700 posts and you joined later the c3 how often do you go on this sight?

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