Err on the large side and you will reduce leading problems. I would consider .430 the minimum, and up to .432 usually gives better results than .429. That .427 diameter is for the .44-40 and would likely give you terrible results. Good luck and keep us posted! ID
Thanks ID. I slugged my cylinders with .457 soft lead round balls (bet you can't guess what I shoot them in).
They slugged .431 in one and .432 in the other. <!--emo&--><img src="http://beartoothbullets.com/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt=''><!--endemo-->
A forum community dedicated to Sport shooters, owners and enthusiasts. Come join the discussion about optics, hand casting bullets, hunting, gunsmithing, styles, reviews, accessories, classifieds, and more!