10mm Remington UMC 180gr FMJ report

10mm Remington UMC 180gr FMJ

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I Just got two boxes of this ammo in the mail yesterday. No one in this area carries it for some reason or another..

Remington seats the 180gr FMJ bullet to a length of 1.248-49”.
Taking a look inside, we find the case loaded with 7.0grs of propellant.

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The propellant looks like a large grained flattened ball powder.

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Here is another look;

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The bullet weighed out at exactly 180grs..

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Took some of this ammo to the range today.
Temps were in the high 50’s. Clear sky, and RH at 60%.

http://i48.photobucket.com/albums/f2...MC180grFMJ.jpg

I shot two groups;
Shot one with the ISMI 22# spring and the other with the factory spring, just to see what difference it made. The factory spring shoots this much better.
The velocity was a little disappointing.. I was expecting at least something in the low 1100’s..
In the picture the average velocity is underlined, followed by the extreme spread, Standard Deviation, and temperature.
Circles are 5½".

Oh well, there ya have it..

Both are good groups (even with the oops). If you are looking for full power 10mm loads, there is only a couple manufactures that load them, Buffulo Bore and Cor-Bon. If you reload, 800X or blue dot will give you the velocities of the origanal 10mm.

Quote:

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Originally Posted by papahawk

Both are good groups (even with the oops). If you are looking for full power 10mm loads, there is only a couple manufactures that load them, Buffulo Bore and Cor-Bon. If you reload, 800X or blue dot will give you the velocities of the origanal 10mm.

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Roger that papahawk..
Yep, I've been giving this G20SF a workout finding out what shoots well.. If you want to check it out;

Glock 20 10mm - Handgun cartridge reloading - Metallic cartridge reloading - The Handloaders Bench

I have a magazine full of BuffBore 180JHC for a rainy day..:cool: They do 1255 fps out of my stock barrel.

Favorite handload is 10.2grs 800-X, starline case, Rem2½ and a Hornady 180gr XTP at 1260fps.

The Underwood ammo I tried created a lot of smileys in the stock barrel..

It's amazing how much most 10mm ammo is underpowered.. not just a little.. a lot!