I recently ordered a bullet mold for .404 Jeffery, bullet size .424", slightly smaller on base to hold gas check. The problem is I can't find gas checks in .423" size. I can get readily available gas checks in .429" (for 44 mag). I have a RCBS Lubimatic sizer and am wondering if it will work to slip the .429" gas check on the .423" base and size it down to fit. Anyone have experience on this topic?