I've been plinking with a 1911 for over 50 years and when I started out there was no 9mm ammo that I knew of so I shot .45acp. Of course as time went by things changed and now there are probably more than a half dozen different size cartridges that are chambered for a 1911. In any case, as the years pass your wrists become more and more aware of the caliber difference between a .45acp and a 9mm plus the different bullet weights etc. I finally sold my 1911 chambered in .45acp and went with a 1911 in 9mm and I only shoot Winchester or Remington 115 grain FMJ or JHP, the reason being there's very little recoil and it's easy on the wrists with little to no muzzle climb and re-acquisition of the target is very quick. Plus there's no way I'll shoot garbage can russian ammo as I have seen too many dumbies that will swear it doesn't jam, of course in a pistol all you have to do is wait 5 or 10 rounds and you'll need a winch to get the spent casing out. My point is a simple one, what difference does it really make if the bullet is 115 grains or 124 grains, for me the ammo that gives the least recoil is the one that generally works best with perhaps the exception being "Duty Ammo", but for range work, when it comes to 115 grain 9mm ammo, given the cost of the ammo and not wanting to buy anything made in russia by that psychotic murderer Puktin, American made ammo is still the best.