Quote Originally Posted by Fuj' View Post
What is that bullet's exact length, what FPS are you at, and what is your twist rate ??.....
Loads that work with a Proof barrel means nothing without knowing how much throat
is available and how much your jumping that bullet. Did you find the jam point to start ??

For 1.5" groups, it can very well be something else. What shape are the groups generally ??
Any reason you chose the Nosler's ??
+1!

Something I learned when playing with ABLRs is they don't necessarily perform best "in the lands" so don't be afraid to experiment off the lands more than "conventional wisdom" might indicate.