I've got a 30-221 (300 BLK) Contender barrelset that Ive been pondering on what to do with for ages.
30-30 has been to the front of my thinking, mainly for practical reasons. Rimless cartridges in the Contender are a pain even though it does extract just fine, and the smaller case the worse it is.
My "main" contender barrel is the 6.8 SPC, 120gn at 2475 - it just plain works to 300M after that its out of snot. Its is fiddly to though.
I think if I was in your situation I'd just persevere with the 30-30, the erractic velocities you mention wont make any practical difference within 300M, and if you looked at some of the older IMR powders, I'm sure you'd fine a better match than the likes of CFEBLK. Cheers
Bookmarks