making gaschecks

[cast367]

Have anyone a good expirience with home made gaschecks??
Itry to do that but the results on the 100 meter range is not good for me.
I have the smallest groups with the expensif Hornady gaschecks.
Maby I do something wrong. I have tryed beercans ,copper and brass from cases.
I make .30 checks

[Wally]

I have with a variety of calibers...

I use aluminum flashing that is .014" thick and the performance is comparable to using Hornady gas checks. In the .30 Caliber I shoot a .30-06, a caliber that is intrinsically quite accurate. If you are not getting the accuracy that you feel you should, you will have to tailor your loads---differerent sizing, lube, powder and/or powder charge. I never expected that I woudl get exactly the same performance with home made aluminum gas checks vs copper commercially produced one.

In my .243 Win and my .357 & .44 magnums I have found the home made gas checks are as accurate as commercially made ones.

I would bet that if you used the same copper stock that Hornady uses, that your home made gas checks would perform just as well as theirs.

[runfiverun]

thickness is your friend,there is a thread somewhere here that discusses the fact that hornady uses different thicknesses of copper for their different sizes of gas checks cut off points if you will, like from 22-270, 7mm to 311, and 32 through 375 etc.
i would measure my shank and the final diameter of what i wanted to end up with and target that thickness of materials. or slightly larger.

[badgeredd]

I use aluminum cat food cans for my 375 checks. It is .008" thick.

Edd

[Wally]

I have found that one needs to use aluminum @ .011~.014" thickness for best results with my Freechex II tools.

[Larry Gibson]

I use .014" brass commercial shim stock. Costs me about $8 per thousand .30/.31/8mm GCs. It is uniform and easy to work with in my GC tool. Below is a comparison od my 8mm GC compared to Hornady's. The load was not worked up but is a pretty good standard load for 180 - 210 gr 8mm cast bullets. Cases were Turks with the berdan milsurp primers. My .30 and .31 cal GCs do as well in a myrid of cartridges. I also have found the need for .014 - .016" thick material for my home GCs to stay on the shanks of most of my cast bullets of .30/.31/8mm.

Larry Gibson

[MT Gianni]

http://castboolits.gunloads.com/forumdisplay.php?f=60

A little further down we have an entire Gas Check sub forum. Lots of answers there.