hi, vic from down under, have made a 50/95 on a henry martini action using a revamped .451 enfield barrel bored out to 50cal, threaded up and cut chamber on lathe . the 451 enfield barrel is a parker hale hammer forged. made lapping tool also. the cases i used were 348 winchester fire formed in chamber on fireing , paper patched 565gr soft lead projectile, cases fire formed after 3shots with the help of 103gr o 2f powder not for the faint harted bunts a bit. to date will group about 2 inches at 100yds have to fit up extractor and finish off the wood work to look like original using rock maple . regards vic