Has anyone made a 20 cal. wilcat on the M1 carbine case? I know that there is a 19 cal. version done by Calhoun, (spelling), but I have not heard of a 20. Calhoun's site says 3500-3700 fps with one of his bullets but he is the only one to make a .19. Just curious? DW

This must be to small to be of any interest. I thought it would be a perfect ground squirrel gun. We call em pot guts in Ut. I have seen one necked down to .22 and read about one in .19 but the availability of .20 bullets is better. It would be efficient, fast enough, and economical to shoot. A 17 would be another thought. DW

Try your question at saubier.com.

Many .17 and .20 wildcats have been done by members; not sure on the 30 Carbine case, but likely!

Check these guys out. They may be able to asnswer your question..

http://www.angelfire.com/sd/6mmackley/twentycaliber.html

I have done a few in both the 22 MMJ, 17 PeeWee and one in 14. All work ok in the carbines but caution is needed to make sure the rifle is COMPLETELY in battery as the pressures are high and you run the risk of a blow-up. Hard on the eyes too! If a suitable bolt action could be had at a decent price??
Aloha, Mark

Hi Mark, and thanks everyone for your replies. I was thinking about a Contender barrel. At least to start. I think the velocities would be about where Calhoon's 19 cal is depending on bullet weight used. Somewhere around 3600fps. I don't think it would be worth a bolt action with all the alternatives out there. DW

DW if you're going to do a 20 on a 30 carbine case get some 19 cases from calhoon and run the 20 caliber expander ball thru them and you are good to go.
you can form your own but may have to anneal the neck and shoulder before firing. the 30 carbine case mouth is so hard it may not expand and seal against the chamber walls. you will get a face full of hot gases.
calhoon uses a 4 step forming process so annealing is not necesary.
comparing a .19 caliber to a 20 caliber is like comparing a .223 to a .224, no real world difference.
make sure you weigh your cases, they vari quite a bit.

Kinda like reinventing the 5.77 Johnson...

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