OK, This used to be a Savage model 110 in 30-06.
I put a cheap 0.458 1:14 barrel on. The barrel fits more like a Remington as it is 1 1/4 diameter at the lug and a straight taper to 0.840 dia.
I was shooting 65 grains of N120 and a 8mm 200 grain SMK in a 43 grain sabot. I was using a Winchester LRM primer, primed in a 45 acp case. When I switched to a 209 primer things got a lot better. Not great, but better and I know that I will be sub moa shortly. I expect to go up to 70+ grains with this powder to try to find the sweet spot, but may need to switch powder if I can't get it to burn.
With a BC of .52 this will be stable past 1k and assuming the accuracy comes in it will make for some fun Summer varmint shooting.
(L-R) 45 shockwave, 200 grain SMK, SMK inside of sabot.
Did I mention that this is a muzzleloader [img]/ubbthreads/images/graemlins/wink.gif[/img]