22 caliber gas checks

[Getdet]

I have a Lee 6 cavity 22 caliber bullet mold and have been having trouble setting gas checks they pull off after coming out of the lubesizer. The gas checks are aluminum and they are .01 in thickness. The lube sizer is a Lyman 4500.Any help would be apreciated

[.429]

Are they attached, but can be wiggled a little bit? Or not attached at all? Are you making the checks, or buying them?

[JonB_in_Glencoe]

It sounds like you need a thicker GC or maybe you could remove some metal from the GC shank portion of the mold, so your boolit's GC shank would be larger.

[JeffinNZ]

What is the diameter of the shank?

[Pee Wee]

You need to use .010 thickness for you check.

[.429]

He's using .01 now. He probably needs something like .014

[Getdet]

Some of the checks wiggle and others don't stay on at all. I have not yet checked the diameter of the base where the gas check goes. I am using .010 aluminum gas checks at this time not really sure where I can get different checks to try

[.429]

Vulcan checks, sage's outdoors, blammer's board (gator checks). Vulcan and sage will send you samples

[Rizzo]

I just received my Lee 225-55-RF mold and the gas check shank appears to be .214".
I will be sizing the gc boolits to .225".
So,...as I understand it, the gas check material thickness should be:
.225" - .214" divided by two.
.225" - .214" = .011" divided by two = .0055" gas check material thickness.
If making your own checks, .006" material can be purchased here:

http://www.coilandfoil.com/

Here's another useful link:

http://www.thegascheckstore.com/

Your .01" material seems a little thick to me.

[.429]

I just received my Lee 225-55-RF mold and the gas check shank appears to be .214".
I will be sizing the gc boolits to .225".
So,...as I understand it, the gas check material thickness should be:
.225" - .214" divided by two.
.225" - .214" = .011" divided by two = .0055" gas check material thickness.
If making your own checks, .006" material can be purchased here:

http://www.coilandfoil.com/

Here's another useful link:

http://www.thegascheckstore.com/

Your .01" material seems a little thick to me.

That don't sound right to me

[Pee Wee]

that should have been .010 thou.

[.429]

sorry, that should have been .10 thou.

Wouldn't .10 thou be the same as .0001"? That's way too thin

[Pee Wee]

I am using .010 on my 224 cast bullets and they work great. they are alum. and are roof flashing material. they crimp on nicely when lube and sizing the bullet.

[Rizzo]

That don't sound right to me

The math was pretty clear.
What doesn't sound right to you?

Here is some supporting info from :

http://www.thegascheckstore.com/gaschecks.htm

To figure which size of gas check you need, you should follow a rule of thumb formula that has been around for years. The formula is as follows:


(SBD - SD)/2 = Material Thickness

SBD is the Sized Bullet Diameter
SD is the gas check shank diameter on the end of the bullet

Still confused?

[Rizzo]

I am using .010 on my 224 cast bullets and they work great. they are alum. and are roof flashing material. they crimp on nicely when lube and sizing the bullet.

Cool.
Hard to argue will success. (smile)
What is your .224 cast boolit shank size?

If it is .214" then the "unsized" diameter would be .214" + .010" + .010" = .234"
Pushing that through a .224 sizer must be a little tight, eh?

[.429]

The math was pretty clear.
What doesn't sound right to you?

Here is some supporting info from :

http://www.thegascheckstore.com/gaschecks.htm

Still confused?

I know from experience that .006 is way too thin. I'm not the one that's confused.

[Pee Wee]

Cool.
Hard to argue will success. (smile)
What is your .224 cast boolit shank size?

If it is .214" then the "unsized" diameter would be .214" + .010" + .010" = .234"
Pushing that through a .224 sizer must be a little tight, eh?

I have a star lube-sizer with Kyles handle, they go thru pretty smoothly. They shoot great. I am shooting a 223 contender 14" bull barrel @100ydrs. just for fun. A 22 hornet contender 10" bull barrel for NRA silhouette targets. A Ruger mini 14 and An AR once the barrel is broke in.

[Rizzo]

I know from experience that .006 is way too thin. I'm not the one that's confused.

Once again, can't argue with success.
It is amazing how sometimes the "math" and "textbook" information does not pan out for some in real world applications.

What was happening with the .006" that it did not work for you?
Was your shank smaller that .214"?

[.429]

Once again, can't argue with success.
It is amazing how sometimes the "math" and "textbook" information does not pan out for some in real world applications.

What was happening with the .006" that it did not work for you?
Was your shank smaller that .214"?

I'm sitting at my bench right now and just re-measured my boolits and gas checks. My Lee boolits also have a .214" shank, and my copper gas checks are .012" thick. Mine seem to always stay on, and do shoot well, but they do wiggle a little bit after being crimped.

[Rizzo]

I'm sitting at my bench right now and just re-measured my boolits and gas checks. My Lee boolits also have a .214" shank, and my copper gas checks are .012" thick. Mine seem to always stay on, and do shoot well, but they do wiggle a little bit after being crimped.

Thanks for the reply.
I'm still wondering what the problem was for you when using .006" material for gas checks.