Not wanting to start a which one is better, but I have a question on the difference between the two. This is an ongoing discussion I am having with a good friend of mine.
Givens:
Power Factor is 125,000 for both bullets.
same brass, primer, powder.
Same bullet; FMJ, RN. Only difference is one is 115gr, and the other is 147gr.
Fired from the same pistol
Same weather, distance, etc.
Unknown: what is the difference between the two types of bullets?
His stance is that they are vastly different with the 147 less recoil, more knockdown power.
My stance is that if the PF is held the same, other than velocity that each projectile is travelling, they are the same.
I've used the SAMMI Estimated Felt Recoil formula - no significant difference between the two. However when I add the weight difference between 10 115grs vs 10 147grs; there is a difference, but is it significant?
Is there a difference between the two????? And what/why?
Thanks