I will be 65 this fall. Definitely slowing down, but when an animal hits the ground and has to be packed out, may take another trip or so. My chief hunting partner is a year older than me and gets around like a goat. He is about 140# and came to the realization about 10 years ago that packing...
My 20" 7PRC shoots the 140AH at 3200fps with RL-16 and Petersen brass. Haven't had the chance to kill anything with it yet. BTW, the rifle began as a 70's vintage Rem 700 BDL 7Mag that I killed my first few elk with. Will have to work up the story.