The point is to killhumanely and recoverquickly, and that's done with extensive tissue damage throughout the wound channel in the vitals. A .44 caliber slugpenciling through will not cause extensive tissue damage which will allow the animal to run much further than necessarybefore dieing,and the small caliber sizeentrance/exit hole is easily plugged with fatty tissue making a blood trail stop.......you'd be better off taking CNS shots with the XTP mag at these velocities.

Never saw a regular XTPfail toexpand or punch bone, I hunt with them in my 77/50 and they freighttrain stuff pronto.......

Have tested the "mags" for effectiveness and they DO no doubtget lots of penetration at lower velocity, but not as much terminal effect as theregular ones. The "mags" areof heavier construction and are designed forwork at higher pressure/velocity than 100 grains of FFg can deliver............