Thanks for the input. I'm going to be shooting a 20" 1:10 JP rifles barrel. I'm new to LR shooting but my needs are only out to 300-400 yards for 3-gun competition. That's not to say I won't want to push my skills and my rifle further but it's hard for me to get to ranges >200 yards from the Bay Area.
I've already acquired some Varget and CCI #34's. I like the #41's for my AR so I figured I'd stick w/ the mil-spec primers.
The Sierra's are a tiny bit more expensive than the Lapua's but at this point I'll take all the forgiveness I can get