POP - 72grs of R22 seems HOT but maybe not in yours. I and many others use 72grs behind 100's. I use 68grs behind a 110AB in my Vanguard for 3450 and submoa groups.
Yup it sure is and thanx for pointing that out!
Mine was a custom though.
Start lowwwwww...... work up sloooowwwww