Well, it seems some things never change. Powerbelts are still taking up extensive bandwidth. Thought I would share my Powerbelt experience.
I bought some 405's on clearance last January. Worked up a load with 70 grains 3f Goex. In Oklahoma's Muzzleloader season, harvested a 114 lb. fork buck with this load. The shot was broadside at around 50 yards behind the right shoulder. The deer lurched and made two leaps and wound up crumpling with his hindquarters switching ends with his front.
No bullet was recovered. The exit hole was large, between 3/4" and 1" in diameter. Damage to the vitals was more than sufficient and consistent with results achieved with the GP 385. Trajectory for the load follows.