Doubling discs for GCs

[gerrycan]

Hey All,
Just for laughs I cut up a coke can and made a few discs with my PM ch/maker. They are about ,004 so I decided to add them to my .012 al. flashing . Well, some of them actually worked and created .016 check . Most, however, found ways to screw up ,i.e.;discs aren't flat so are difficult align in former,now and then one would stick on the male die separating from it's mate. I might flatten out the discs before forming and then maybe I'll just forget about it and go back to normal "production".Gerry.

[greywuuf]

WoW!, I wish I would have thought of that ...... try two .0a2's Please ... that would put us in "stock" territory for the 50 cal checks that we are having a discussion about currently.

[Sonnypie]

I have a roll of copper flashing that is .006" thick.
I originally ordered a PM GC maker with it in mind. I banged around with different metals and found out that .014" Abloominum is what works best.
Not finding any around me I put in a special order for perzackly the prescribed stuff.

In the meantime, I did some double up with the copper. It's a PITA to punch as it tends to deform around the punch and makes the strip feeding difficult.
But the disks, when doubled in the cup former work out well. And I got a batch of boolits done and 50 of them loaded for testing from the double coppers.
Meanwhile, I checked on my order and it is still not in. #&^%$@#(!
Pardon me.
I've made .006 copper, .011 brass, .0092 Aluminum, .016 aluminum, and now my double coppers.
The brass is sexy. And the .0092 aluminum is gold anodized on one side, which is nice as well.
But the .0092 is marginal in grabbing the boolits bottom. Anything thinner just won't do.
And while cans are an appealing idea, and I too even cut one up, I'm not going there. I'd rather go buy flashing material, or sheets to cut up.

[JeffinNZ]

This is how I have made my .303 checks from day dot. I can't find a source of suitable 16 thou so use 12 thou litho plate outer and a 4 thou soda can wall inner. In the FC II and FCIII devices I do both sheets at the same time. Works great.

[PatMarlin]

In my opinion, doubling disks is a poor solution to compensate for dies that produce gas checks that do not fit, or using thinner metal then is optimum.

Why risk checks separating, by doubling gas checks specially for 50 caliber?

I think either using metal to fit the shank (.022-.023 for 50 cal), or adjust the mold is a much better solution to make a solid gas check.

[gerrycan]

Couldn,t agree more and the pop cans are a bear to handle, experiment over. Gerry.

[JeffinNZ]

In my opinion, doubling disks is a poor solution to compensate for dies that produce gas checks that do not fit, or using thinner metal then is optimum.

Why risk checks separating, by doubling gas checks specially for 50 caliber?

I think either using metal to fit the shank (.022-.023 for 50 cal), or adjust the mold is a much better solution to make a solid gas check.

Per above:

"I can't find a source of suitable 16 thou so use 12 thou litho plate outer and a 4 thou soda can wall inner. "

Nothing to do with dies Pat. Everything to do with necessity. They don't seperate and if you can get better than this out of a .303 Brit with single layer then let me know.

[iwottopq]

Hello to all.
Compliments dear JeffinNZ for the results.
I am now trying your formula, a outer layer by litho and a inner layer of coca can.
In alternative I use 2 layers by litho and both shoot very well.
I shot a bit less well with a single layer by litho or a single layer by coca can.
The boolit is a Lee 160 grs shooted in a Baikal .308 rifle with a 1:12 barrel.
Ciao
Nino

[PatMarlin]

Wow that's some good shootin' JeffinNZ. I thought the curvature of the earth's magnetic pull in New Zealand was to much for those kinds of groups? ..

I realize you double out of necessity. I was referring mainly to Gerry with 2 layers of flimsy AL cans. That's a pain in the butt, but I see where the stiffness of litho would work better.

Greywuuf was considering opening up his mold shank to be able to use thinner metal on 50 cal.

[JeffinNZ]

Oh I agree it's a PITA Pat. And the more layers of thin material you use the uglier the checks become. The risk of using very tiny material is that the rifling may cut through the first layer and compromise the ingetrity of the material. The entire business of making gas checks is certainly an exercise in wanting to make it work.