What kind of loads were you using with the 155s?

I've been using 155s for about 4 years now, with *no* issues.

This is from load testing earlier this year (February) on a nice clear, crisp morning with no mirage, and basically zero wind (great day for load testing!):



(sorry for the fuzzy pic, I went downstairs and snapped a cell-phone pic of the target)

Like I said, the barrel on the 12 F/TR tend to shoot 155s very, very well in my experience (I'm on barrel #5).