Finally, I am ready to test-fire my Sig P220 .45 ACP suppressed, using the Ti-Rant .45 suppressor that worked pretty well with the .40 S&W cartridge fired from a Glock G23. For the initial test, I used American Eagle 230 gr FMJ ammo, which is supposed to have a muzzle velocity of 890 fps. >45 ACP is said to be one of the best large bore center-fire pistol cartridges to suppress, because almost all .45 ACP ammo is sub-sonic.
Well, I need to try different types of ammo before pronouncing judgement, but from my initial test run, it was louder than the .40 S&W. Again, firing without ear protection was not that unpleasant, but it seemed to me to be about the same as a .22 LR high velocity without a suppressor. This is, of course, a test of only one pistol with a single suppressor, and I intend to try different brands of suppressor as soon as I can. Still, the result was considrably quieter than an unsuppressed .45. Even without suppressor height sights, Imy accuracy seemed improved with the suppressor, versus without. With a good red dot sight mounted, this would be an excellent woods walking gun, as well as a first line home defense weapon.
Again, the Sig P220 was flawless while firing with the suppressor. I am more impressed with this pistol each time I fire it.