If 195s run out, you run 190 LRHT, 184 hybrid, 180 vld all have similar bearing surface. 180 hybrids shoot well 100k lands. You'll have no issue. 8.5tw will likely do just fine with 195s, but 8 won't hurt. My 7-300prc is 8tw and has 245k freebore for the 195, 190,184 and 180vld.