Hey guys just to update from the other day. I adjusted the OAL to 2.60. I went to the range & shot a pretty good group With AA1680 & Nosler 120 Bal Tips. Still showed a little pressure at 24.5, but was much better at 25 grains.

3 shots 3/4" at 100 yards
4 shots 1 1/16" at 100 yards
5 shots 1 3/4 " at 100 yards

The average Fps was 2396 out of the 21" factory carbine barrel. I expect to do better overall group sizes in the future as I get more accustomed to shooting this as a carbine. Accourding to load data I should be able to reach 26.5 Grains of AA 1680. I'll continue to work up with this & also start with AA2015Br as well.
Thanks to all of you guys for the help you've given me so far.

Rich Jake