I just got a box (of 100) of the new 135 gr Sierra HPBT MatchKing bullets. The new 135's are about 0.032" shorter than the 150 gr Sierra MK.
The bearing surfaces for the 4 bullet are:
135 gr Sierra MK ~ 0.277"
150 gr Sierra MK ~ 0.335"
125 gr Sierra GK ~ 0.368"
125 gr Speer TNT ~ 0.332"
With the 16-inch Noveske barrel, I am hoping to get about 2400 fps with these. I have been able to push the 125g Speer TNT to over 2500 fps with this barrel.
See here:
http://www.quarterbore.net/forums/sh...?t=1595&page=2
If is warms up a bit, I hope to load some up and try them out this weekend.
320pf