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troyboy
06-26-2014, 11:42 AM
Has anybody reformed this to another cartridge? 10 or 12 gauge? Any other wildcat?
texassako
06-26-2014, 11:53 AM
I recall seeing a 20mm necked down to .50 cal. Sort of a .50 caliber magnum.
dtknowles
06-26-2014, 04:00 PM
108908I converted some 20mm cases marked as M103 to fit a 25mm Polish Flare Gun.

108901

Tim
AggieEE
06-26-2014, 05:44 PM
That 20mm/.50 was called a FATMAC. Idea of one of the McMillian boys, the ones that make the rifles. It looks like a 6mm PPC on major steroids. It is suppose to get a 750gr. 50 cal bullet up to something like 3K fps. I have no idea what the recoil is like.
JeffinNZ
06-26-2014, 06:37 PM
That 20mm/.50 was called a FATMAC. I have no idea what the recoil is like.

Or the throat life!
troyboy
06-27-2014, 09:41 AM
Got a bunch and trying to find a use for it. The flare gun is a good start.
old cobra
06-27-2014, 09:50 AM
Sounds like a good contender caliber.
reed1911
06-27-2014, 11:33 AM
If you figure it out let me know I have bunch in boxes out back.,
dtknowles
06-27-2014, 01:08 PM
Got a bunch and trying to find a use for it. The flare gun is a good start.

I only made two before I decided it was not worth the effort and just when and bought some more flares.

Tim
chill45100
06-27-2014, 05:57 PM
Hmmm, .22/20mm? 90 grain boat tail solid at warp factor .7 ??
rmatchell
06-27-2014, 07:07 PM
Wind chimes?

I would think that it would take one heck of a press to form anything out of them. Could be done and would be fun just would take alot of work.
zuke
06-28-2014, 06:24 AM
Sell some as is, I'm sure some of us would like them for the collection.
Artful
06-30-2014, 07:43 PM
I'd be thinking about popping for the $200 tax and making a 20 mm cast boolit cannon :bigsmyl2:
After all if it's good enough for the FBI
http://www.thetruthaboutguns.com/2010/06/robert-farago/fbi-buys-anzio-ironworks-mag-fed-20mm-why/
And they will rock your world

https://www.youtube.com/watch?v=-XKeRjX9Vbs

Come to think of it didn't Charles A. "Skeeter" Skelton's co-hort in shooting "Jug" Johnson neck the 20mm down to .429 as the ultimate 44 magnum?
http://www.darkcanyon.net/skeeter_skelton.htm

If you make a wildcat you need to make the bore .50 / 12.7 mm or smaller to have it not be a Destructive Device by ATFE's rules
https://www.atf.gov/files/regulations-rulings/rulings/atf-rulings/atf-ruling-95-3.pdf

(https://www.atf.gov/files/regulations-rulings/rulings/atf-rulings/atf-ruling-95-3.pdf)