I chronographed some of the 124 grainers today and they averaged 1,354 thru the AR15 for a PF of 167,896. Not quite Major 9 even in an 18" barrel. Some 115 gr Zeros with the same 5.4 load went 1,380 in the AR for a PF of 158,700
Suspect the 124s would make a PF around 160,000 in my 3.9" barreled STI Stinger but I won't risk it.