I shot my son's 243 also, and seemed to do okay with RL19. Maybe not the perfect powder, but it is decent' enough. Trigger needs a little lightening, but overall, I found a decent deer load I think.
41gr (2610-2669-2695)
42gr (2790-2750-2789) (the boy shot this group over the chrono) Did a good job for a 13 Y/O I'd say
43gr (2767-2769-2759)
44gr (2930, 2931, 2920) An actual target wasn't shot on this one. I couldn't keep the boy off the rifle, so I let him shoot steel with it. I will get it done next time out, but I am betting with an ES like that, it should be fine.
I have some IMR4350 I will try later. For right now, the 243 has a proper deer load to work with. Scotty
41gr (2610-2669-2695)
42gr (2790-2750-2789) (the boy shot this group over the chrono) Did a good job for a 13 Y/O I'd say
43gr (2767-2769-2759)
44gr (2930, 2931, 2920) An actual target wasn't shot on this one. I couldn't keep the boy off the rifle, so I let him shoot steel with it. I will get it done next time out, but I am betting with an ES like that, it should be fine.
I have some IMR4350 I will try later. For right now, the 243 has a proper deer load to work with. Scotty