I switched to a 365 gr powerbelt this year. I finally had a chance to test it. I stalked a doe in the field for an 80 yd shot. She turned broadside and I fired. Dropped her in her tracks. I was impressed. I am shooting a T/C Thunderhawk in .54 cal using 2 pyrodex pellets and an aerotip 365 bullet.
The bullet did some damage at the exit point.