What exactly does 'proven' mean?

It's not like 140 grains at 3050fps is a total mystery. I can say this with 100% certainty and I wasn't even there --- the first animal ever properly hit with a PRC died in a very, very predictable manner. It didn't 'prove' anything, nor will the next 100,000+ animals that are killed with it.


Originally Posted by 16bore
If I've got 800HP, is 850HP worth chasing?


Again, you use the 270 as the starting point, but that logic goes both ways. If I have a PRC why would I buy a 270? There's no need to 'chase' anything, it's no trick to get a PRC to hit its published velocities.