Hello out there, I'm the new guy, I last cast and shot cast boolits about 12 years ago when I shot IHMSA matches, some things are long forgotten , some I think I did yesterday, go figure. I've bought a Ruger Bisley in .45 Colt and I think I'm really going to enjoy it. A couple of questions though , my chambers measure .4525" -.453" , what size do I size my boolits? I used a Lee 300gr mold and their sizing push through die in .452 but the liquid Alox make the cartridges hard to chamber after lubing them twice ,[ before and after sizing]. Should I go to a .453 die in a Lyman lubri-sizer? and do I have to use gas checks at 1300 fps. with this mold? Thanks in advance for your help and I know I'll be asking more questions soon. Thanks again ribber