I played with some 190gr SMK in my 1:12 SPS .308 back in the summer. I only worked through one box of 100 of them, but from what I could tell, there was no reason to believe I wouldn't be able to get them shooting sub-moa consistently if I spent some more time working up a load. Put down a few .7 and .8 moa groups if I recall correctly at 300 yards.
Only reason I didn't carry through on this was cost; bought this box at the LGS cause it's all they had at the time (for $35/100) and I figured what the hell. Let's see what happens.
I've got the 168 and 175 pretty much down to a science. Next in line is Berger's 168gr Match Hybrid.
It's all just a big experiment for me; loving it.
NRA fo Life Member