Anyone on CGN use/shoot 22LR "squeeze bore"? 22 to 20 or 22 to 17?

Donny Fenn1

Donny Fenn1

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This has just come to my attention. Dude's are getting 22LR chambered barrels that are squeeze or squish bore down to 20 or 17 caliber. Of course it's a USA thing but surely a gun nut has done it? Thoughts? Experience?
 
The Littlejohn adaptor was a device that could be added to the British QF 2 pounder (40 mm) anti-tank gun. It was used to extend the service life of the 2-pounder during the Second World War by converting it to squeeze bore operation, improving its ability to penetrate armor.
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Perhaps a muzzle squeeze bore devise like the Little John?
 
Sounds interesting. I think a .17 would be too much, but the .20 sounds reasonable. Just need a reamer with a long and gently tapered leade. Gain twist could also help.
 
This is not a new idea and it doesn't appear to achieve much that's positive for .22LR shooting.

For more details, see the following threads
h ttps://www.rimfirecentral.com/threads/17-22-swager.533710/
h ttps://www.rimfirecentral.com/threads/anyone-shooting-a-squeeze-bore.591136/?post_id=5453107&nested_view=1#post-5453107
h ttps://www.rimfirecentral.com/threads/squeeze-bore.1139073/
h ttps://www.rimfirecentral.com/threads/squeeze-bore.1302338/
 
Donny Fenn1 said:
I know! Which is why I was all "ok, that's cool, I wonder how it works"
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They were pretty accurate from what I heard. Velocity were high too. But be interesting as 22LR doesn't have much case capacity, so curious the loss in velocity they got and not squib.

I know some Airguns have choked muzzled. But they also use way softer lead.
 
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