| DarylS |
| (.700 member) |
| 12/08/11 02:12 AM |
|
Re: Lancaster Colindian ball and shotgun bullet diamter?
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For obturation to take place, the bullets must be very soft and black powder be used to 'slug' up the bullet very much. It happens easily in ctgs. like the .45 and .50 cal. Sharps - with paper patched pure or almost pure lead bullets.
If the bullet doesn't slug up immediately to seal it is generally gas cut and innaccuracy and severe lead fouling is usually the result.
CCar - this doesn't make sense to me. The bullet cannot be reduced to .690" before hitting the rifling as then it would be choke bore size and too small to engrave in the choke's lands which run to .738" groove depth FROM .690" bore size.
The bullet must be full bore size (.736" to .738") before hitting the rifling. I was not aware there was a smooth section of choke before the lands in a paradox - that part also doesn't make sense.
Quote:
"Let's say the bore is .738" and you slug is .736. The slug travels down the bore and enters the choke 4" from the muzzle. The Fosbery slug passes thru the smooth portion of the choke and is reduced to .690", then engraved and spun in the ratchet rifling in the final 2"."