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  #1  
Old 08-21-2021, 10:18 PM
ratbbb2 ratbbb2 is offline
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Default M&P 22 Compact Ammo
Hello all . New to firearms and have some questions.
My wife ordered an M&P C calibered in 22 and I bought some low Velocity ammo for her. Today we were told that might not be strong enough to cycle the pistol. Anybody have a experience with L.V. ammo and the M&P C?I have a 45 !(!! and hope to get a 22 cal. slide kit when they become available so this is for both the wife and I.
Thanks in advance.
Last edited by ratbbb2; 08-21-2021 at 10:20 PM.
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Old 08-21-2021, 10:55 PM
NukeRef NukeRef is offline
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Quote:
Originally Posted by ratbbb2 View Post
Hello all . New to firearms and have some questions.
My wife ordered an M&P C calibered in 22 and I bought some low Velocity ammo for her. Today we were told that might not be strong enough to cycle the pistol. Anybody have a experience with L.V. ammo and the M&P C?I have a 45 !(!! and hope to get a 22 cal. slide kit when they become available so this is for both the wife and I.
Thanks in advance.
The best way to find out is to load it up and go to the range. The 22 Compact is designed to be a suppressor gun, so your subsonic ammo should work. The worst that can happen is that you have to cycle the gun manually. The ammo won't hurt the gun.

My guess is that you're more likely to have trouble with that ammo in the 45 conversion.
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Old 08-21-2021, 11:14 PM
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A general rule of thumb for .22 ammo that will cycle semi-autos is .40 grn w/1200 FPS + velocity (as written on the box).

I primarily use Federal Auto Match bulk boxes.
Last edited by CB3; 08-22-2021 at 08:04 AM.
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Old 08-21-2021, 11:23 PM
Jim Watson Jim Watson is offline
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My Plastic M&P .22 Compact demanded HV to start with but after a few hundred rounds, it became reliable with SV. "Break in" in Internet English.
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Old 08-21-2021, 11:25 PM
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Post #14 in this thread may give you some real world insight:
Best ammo M&P 22 Compact/M&P 15-22
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Old 08-22-2021, 12:16 PM
ratbbb2 ratbbb2 is offline
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Thanks for the replies. If the cycling is the only issue then we can deal with it manually or toss / donate the ammo.
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Old 08-22-2021, 12:40 PM
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I have an M&P Compact 22 with a threaded barrel and silencer. CCI Quiet would not cycle it but with Eley subsonic it has been flawless.
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Old 08-22-2021, 12:40 PM
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George_P_Burdell George_P_Burdell is offline
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An additional thought on ammo ... having shot the remainder of my CCI Standard (40 grain lead round nose, ~1070 FPS), as a matter of course I now only shoot copper plated / poly coated ammo in my 22s. I've found this makes cleaning the barrels a snap as "leading" is no longer an issue.
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Old 08-22-2021, 12:55 PM
NukeRef NukeRef is offline
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Quote:
Originally Posted by Erich View Post

The only issues were that CCI Quiet 40-gr RNL will not cycle the action (when you see the numbers, you'll see why) ...

The chrono data:

CCI 40-gr Quiet lead solid
M 598.9/S 40.23/D 18.94 - these would not cycle the action
WOW! That CCI Quiet is really slow! (300 fps slower than their spec). No wonder it wouldn't cycle.

Nice work, Erich, and I'll bet you had a lot of fun doing it.
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Old 08-22-2021, 12:59 PM
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Originally Posted by ratbbb2 View Post
Thanks for the replies. If the cycling is the only issue then we can deal with it manually or toss / donate the ammo.
You didn't mention the brand of your low velocity ammo. How about you at least tell us the muzzle velocity posted on the box.

And let us know how it works out on the range.
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Old 08-22-2021, 01:50 PM
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Originally Posted by NukeRef View Post
WOW! That CCI Quiet is really slow! (300 fps slower than their spec). No wonder it wouldn't cycle.

Nice work, Erich, and I'll bet you had a lot of fun doing it.

Thanks - of course, their specifications were almost certainly quoted from rifle-length barrel tests.
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