I have a new .357 lever gun & a ruger blackhawk....need some new molds. Will buy 158 & 180 grains with flat point. Should I buy the gas check versions? Probably wouldn't matter for the pistol but, with the higher velocity of the rifle do I need the gas checks? Will be using wheel weights & cold water dump them & just get the cheapo Lee sizer/gas check seater. Thanks for any opinions. Scott