I used a Magnum Load as soon as they made a Magnum MLer, I figured Bigger was Better. My Accuracy Suffered a little but I could still get a decent group out to 100+ Yds. I put a Woopin on the Deer when it hit them. My Shoulder Really Sufferd also when I used to shoot about 15 rounds through it I'd get a Black and Blue Shoulder from it, I'd Cringe at the next shot but I though it was Cool to shoot 150grs of Powder, everyone knew when I shot when we were Hunting, then I got Smarter
I learned that with 150gr's of Powder not only was My Accuracy and Shoulder Suffering (and Im a Big Guy 6'6" 240=) but My Mler was Suffering too because I was just blowing out some of the Powder and Not Burning it all and this was'nt the Best Load for My MLer.
I started playing around with Lose Powder (Pyrodox RS) and started off around 90grs and finally found out My MLer liked 110grs the Best and I shot 1"groups at 100yds and I could shoot just as far with 110 as I did with 150 but shot a-lot better.
(BP)