500gr. at 1,500fps is pretty good in a nitro for black load.
ie: 52gr. IMR3031.
Interesting.
That load will pen. end to end & exit his chest on a big BC Bull moose. My bro has done that with his .45 3 1/4 Sharps. same ballistics using a 500gr. Hornady with BP load of 120gr. M0oose braced his front feet and refused to take a step. Dropped in his tracks after about 10 seconds. The impact was quite audible - WHUCK!