Update:
Got some 155 Scenars to test. Was not the best conditions to test in, but was eager to see how they compared to the 175 SMK under same conditions.
So here is what I found out. All shots were done at 500 yards. I shot a pretty common 155 Scenar load and seated them at .010 variance just to start. Also shot the 175 SMK load that had worked well in another rifle. I chrono'd the rounds and got avg 2956 and ES 9.
Even in a 16 MPH wind that switched from full value from the right to behind me, the Scenar's loaded .030" jump shot about 1/2 size the group of the 175's. Guess that's what we are using next time out and see how they actually shoot in a match. Doing a 600 yard FT/R in a few weeks.
I did have the barrel looked at at there is some chatter on the lands. If I can get through the rest of the year w/ some decent results (or better than before) I will re-barrel over winter.
This is my son's gun and he is having a blast shooting in some matches. Just wish I would have looked into this earlier as I feel partly responsible for his performance with this rifle so far.
Thanks for the comments/feedback.