Originally Posted by warbeak2099
Yea I was getting a lot of breaks through my .682 this weekend, but I was shooting Diablo Heat in cold weather. It's not the fact that I was underboring, it's the fact that the paint was ****ty and brittle (it broke on the first drop when I did the bounce test) and it was super cold out. When I switched to overboring it, it didn't break, but it went anywhere but straight (dimples all over the damn things). Finally I switched to .685 (still underboring but not by as much) and it shot great. I think the optimum underbore is around .002 smaller than the paint, for really super brittle paint at least.
I live out in connecticut and the weather wasnt a problem but im gonna go with a new hopper this weekened to see what happen's.