barnetmill
Member
- Joined
- Jun 6, 2006
- Messages
- 1,264
Is it mechanically possible to make a 10/22 like gun in 5.7 without giving it a massive breech block.A Ruger 10/22 in 5.7 would be pretty nifty.
BSW
Ruger no longer makes it in .22 magnum. The center fire case of the 5.7 would work better in a blow back, but there is still a need likely for a heavier bolt and a delayed blow back action. Big question is if sales would justify the cost of the design changes and tooling up to make such a rifle.
A retarded or delay blow back might have worked. Problem is a 22 mag rimfire case head is much weaker than a 5.7 solid head center fire case. The 22 mag is already pushing the design envelop and adding blow back to the equation is really pushing things.
10/22 magnum- Internet rumors are like the following from rimfire central https://www.rimfirecentral.com/forums/showthread.php?t=443662
The official answer from Ruger was lackluster sales. It was manufactured for 9 years and only about 50,000 units sold. Compare this to over 5,000,000 sold of the 22 LR version.
Then there is the other assumed answer that the 22WMR was discontinued due to extraction issues and breaking bolts. We'll never know for certain most likely.
Bolt Mass
I have no experience with the 10/22M, but I believe there was an inherent design problem. For blow back actions, the mass of the bolt is what gets the job done and I don't think Ruger could get enough weight in there. Calculations show the bolt mass needs to be close to one pound for the .22 magnum cartridge.
Some designers make the error of thinking heavier spring pressure through heavier or numerous springs will compensate, but that doesn't work.
Regards, Ray
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