I was rather amused by a box of .45 Auto 230 Grain FMJ RN ammo that my son picked up for our collection and gave to me today. It is a black American Eagle box marked “Suppressor” on top of a drawing of a typical pistol sound suppressor. The bullets are GM FMJ RN 230 grain of what appears to the eye to be a very normal ogive and OA seating length. What amuses me is the hype on the box - “Subsonic to maximize noise reduction; Bullet weights and configurations are carefully selected for suppressor use, etc.” This ammo, by the way, ins Federal American Eagle Index Number AE45SUP1.
Since the speed of sound 1,126 FPS (in dry air, at 20 degrees Celsius), and Federals normal “Hardball” 230 grain FMJ RN loading in .45 Auto caliber, Index 45D, has a listed MV of 850 FPS (pretty much the norm for all .45 auto ammunition, non-Plus P, of this bullet weight), and the list MV for this “Suppressor” ammo is 840 FPS, probably within the normal deviation for any .45 auto round listed at 850 FPS depending on temperature, altitude, barrel length, etc., it is hard to see why this load is anything special in regard to silencer use. Further, as already mentioned, the bullet shows no revolutionary bullet shape.
In short, virtually all .45 Auto 230 grain bullet ammunition is subsonic.
Leaves me to believe that this stuff is nothing but hype, right up there for silliness with the Zombie ammunition.
The cartridges by the way, are in normal “FEDERAL 45 AUTO” headstamped, brass cases, with nickel boxer primer.
Something special? Hmmm. I don’t think so.
Reported here only because it is the first of this “brand” from Federal that I had heard of.