Anyone have a gun chronograph and access to a range that allows them?

Glock357 · Oct 18, 2012

I bought a new mechtech C.C.U to convert my Glock 22 to a .357 sig 16 inch barrel rifle. I tested it at my local indoors range in Rockville and its really cool and accurate.

I have a few boxes of Grizzly cartridge ammo for it claiming 1900 fps out of a 4 inch barrel for 90 grain bullet. I am wondering how much faster the bullet gets out of the 16 inch barrel?

Is anyone that have a chronograph and access to a range that permits them, interested in helping me test it?

Thanks.

Eddie Van · Oct 22, 2012

This link might be useful. It appears to be real-world data.

http://www.ballisticsbytheinch.com/357sig.html

BTW, how do you like the Mechtech? Is it heavy?

(And welcome to MDS!)

Glock357 · Oct 22, 2012

Eddie Van said:
This link might be useful. It appears to be real-world data.

http://www.ballisticsbytheinch.com/357sig.html

BTW, how do you like the Mechtech? Is it heavy?

(And welcome to MDS!)

Thanks for the link.

The Ccu is a very interesting concept. It's not very heavy, just the right amount to feel stable in your hands and to reduce recoil. By the way recoil is almost non existent when compared to a real rifle. I trained with a HK11, G3A4, AK47 with NATO 7.62 and those kick. It's very accurate with red dot sights and I get 3 inch groups standing position 50 feet. Now, I have to admit that I get better grouping with a .22, but then those are so light and without recoil. I think the greatest hindrance to accuracy is the Glock trigger. Rifle triggers have a smooth uniform pull and click vs. the glock where you have to overcome a threshold.

I checked out the ballistics by the inch site and one can get an idea of percent speed increase as a function of barrel length. The data the site reports were taken with a bolt action rifle where 100% of the energy goes to propel the bullet. My problem is that the Ccu is blowback action which absorbs some of the energy of the explosion. The second problem is that the lightest bullet for the .357 sig reported is 115 grains while the Grizzly cartridge bullet is 90 grains. These differences make it hard to estimate the speed increase from a 4 inch barrel (1900fps) to 16 inch.

hdatontodo · Dec 4, 2012

This is the first I'm hearing about the Mechtech Systems CCU

http://www.mechtechsys.com/glock.php

Interesting.

Anyone have a gun chronograph and access to a range that allows them?

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