10mm Subsonic


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Nightcrawler
March 30, 2003, 03:04 AM
H&K used to make a 10mm MP5. It could be fitted with a suppressor. Now, like all suppressed weapons, a 10mm MP5 would benefit from subsonic ammunition.

In order to be subsonic, your bullet can't leave the barrel at more than 1100 feet per second, abouts, at sea level.

Now, when you have a speed limite set for your bullet, the only way to get more power is to get more bullet weight. So far, .45ACP is the best round for suppressed use; a 230 grain bullet at 950-1000fps is pretty potent.

But what could 10mm do? It's high pressure enough to push a fairly heavy bullet to that speed.

So here's my question, just to quell my curiosity. What's the heaviest bullet a "full-house" 10mm load could push to 1000 fps or so? The heaviest bullets I've seen for 10mm are 200 grains, but you could probably make one heavier than that if you really wanted.

Anybody got any ideas?

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Cal4D4
March 30, 2003, 10:00 AM
There are 220 grainers around that can easily be pushed that fast. The only one I know of off hand is the West Coast copper plated slug.

agtman
March 30, 2003, 07:09 PM
10mm/220gn bullet @ 1000fps.


Check over on GT's 10Ring, but I believe MCNETT posted some reloading and chrono data on the 220gn 10mm bullets from Rainier (and, possibly, others). I believe he's pushed it well beyond 1000fps.

No "factory" ammomaker I'm aware of loads a 220gn bullet in 10mm.

nvrquit
March 30, 2003, 07:22 PM
... that Agtman alluded to:

http://www.glocktalk.com/showthread.php?threadid=26869&highlight=220

This post has several loadings posted for both West Coast and Precision Bullets.

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