Well I finally made it out to try some groups with my first ever cast bullets. After honing the Lee bullet sizing die out to size them .244 I loaded them on top of Trail Boss. I seated them to the same depth as my jacket bullets - 10 thou off the lands. I gave the bore a real good cleaning with wipeout - no copper left in it.
To my suprise and satisfaction the first group of 10gr was 0.6" at 50 yards! The next couple weren't so good but the last, at 12gr gave 1.5" at 100 yards (not shown). I still need to fine tune the loads figure out how to fit the best zero in with my jacket loads but I'm very very pleased with the results.
This load will be for hunting small game to eat, and also to fill the gap of where my 22wmr was. Initial signs exceed expectations. Velocity was I think around 1200 fps. I was hoping for a subsonic load and am thinking I might try less than the first. But even at 1200, with an 87gr bullet it should be pushing out at least 22 magnum energy. And at 14p per round, it's cheaper too.
I through a bolt in my wood lathe and hit it with a grinder, then sanded it to make a tapered rod for bell-mouthing the top of the neck very slightly. The gas check now sits about halfway down when rested there. Seating the bullets has slightly less resistance than the jacketed bullets but feels even for all cartridges.