I have a 4C, MP-312-440 mould that I got from a board member in Australia a few years ago, and I finally got around to trying some boolits that I had cast right after I rec'd the mould. Alas, now years later, I discover that the gas check shank measures .288-.289 and neither the Hornady nor the Gator .30 cal gas checks fit on easily. The alloy used was 10:1(ww:lino). Could I "shrink" the gas check shank diameter with another alloy? If so, what alloy should I try? Is there a better solution?
The mould drops 4 boolits, each time, all hollow pointed very nicely, and the boolit diameter is .314, which sizes down nicely to my desired .311. Any suggestion to a solution will be appreciated. Thanks, --Shuz