Suppressing the .45 ACP?

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.

The Ti-Rant 45 suppressor with the standard booster piston for .45 ACP (not metric, .578 x 28) fit on the Sig P220 barrel fine.

The Ti-Rant 45 suppressor with the standard booster piston for .45 ACP (not metric, .578 x 28) fit on the Sig P220 barrel fine.

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.

Luckily, the Sig P220 barrels are threaded RH, and use .578 x 28 thread pitch - not metric.

Luckily, the Sig P220 barrels are threaded RH, and use .578 x 28 thread pitch – not metric.

Again, the Sig P220 was flawless while firing with the suppressor. I am more impressed with this pistol each time I fire it.

My 40th anniversary Sig Sauer P220 in .45 ACP w/ suppressor

My 40th anniversary Sig Sauer P220 in .45 ACP w/ suppressor

About MikeH

Texas hunter and fisherman for 50 years, published outdoor writer since 1979, licensed charter boat operator from 1982 to 2013. Past Member, Board of Directors, National Association of Charterboat Operators, current member Environmental Advisory Committee to the DOE and the Strategic Petroleum Reserve. Married to Dorothy since 2000, one son, Michael who is recently married and living in Nederland, Texas. My wife and I live in Oyster Creek, Texas, near Freeport, and have a hunting property outside of Brazoria, Texas.
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