In noway is this a taste great less filling post. I am seaking opinions from shooters who have experience with .40 and .45acp in the same platform same weight. I am a huge fan of the .40 not saying it is better or worse I just like it for it's gaming versatility, I also have pretty much settled on a Lightweight commander as an all around carry piece. I am tired of bucking the trend and .45 1911's are everywhere, what kinda recoil should I expect. The math tells me a .40 180 and a 45 180 should generate about the same. Beleive it or not I havent fired a .45 since desert storm but shoot 1911's constantly. To me it comes down to ammo .40 I have tons of .40 tons of small primers and free brass. Plus I wont have to change over the dillon, 45. cheaper easier to find pistol, magazines , parts , more likely to run when I get it. Pain to stock Large primers switch over Dillon and another caliber of components, no free source of brass. Perceived increase of recoil with factory hollowpoints. Guess my choices come down to scrounging for a Para 1540, or Kimber procarry, Building a .40 on a Para 1345, Caspian, or STI frame. Going singlestack in a Kimber Procarry .40. Or spending half the money on a used .45. As much as I like the new XSE 38 super lwt colt the lack of full power 38 super factory ammo has got it scratched off my list.