I,d start at 70 gr and work up I used 200gr TBBC 215 M primer Win case and OAL of 3.340. We got to 74 grains and quit. each rifle is different.
I have 2 7mm Mags top load with 160gr Bullets to get equal velocity is 3 grains different. I have be careful which shells I put in which rifle. Good
Luck. I believe he killed 2 Elk with that load.
