At one point I had a nice 4". M624. Cylinder throats were .432", which is normal for 624's, & older 29's / 629's.
I got excellent results w/ a 260WFN / .432" / 10BHN, from an LBT mould - over VV N-330. 6.8 grain charge.
Bought the bullets from a guy in Alaska (off the Cast Boolits Forum), that did business as "The Bull Shop". Nice, meticulous guy, w/ a family run business. Not sure if he is still around - or not. Also manufactured a great bullet lube (quality comparable to LBT Blue), called Speed Green.
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Regards - GCF
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