understood pete your just passing on info . no issue
also as i understand it that would be correct concernig 3F .
but i do not belive this to be critical

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typical entry in Lyman - 50/90 Sharps: 498 grain cast bullet


while this may be true
a) is a cased bullet
b) the guns reciever is of a complete diffrent design

your not dealing with a drum bolster or a snail bolster with a cleanout or for that mater a nipple which is derectly subject to the pressures of the bore

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