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Old 04-20-2012, 08:39 AM
Cody Cody is offline
 
Join Date: Jul 2009
Location: Calgary
Posts: 8
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Quote:
Originally Posted by 32-40win View Post
As I understand it, the Rolling Block breechblock will loosen up and gain headspace on high pressure loads over time due to not having enough support for the breechblock. They were chambered for 7x57 at one time, and apparently had some troubles with that over time.
The falling blocks like the 1885 and 44-1/2 do not suffer that issue, they will handle it.
I expect that is why the Ubertis are not chambered for high pressure cartridges even though they are modern steels. You may get a better technical answer to your question on the ASSRA forum. Should perhaps look at a book called the Single Shot Breech Loading Rifle, by Ned Roberts and Ken Waters, and Singleshot Rifles and Actions by Frank de Haas.
The Frank de Haas book was referred to elsewhere so looked it up on Alibris and Amazon; $150 for the cheapest one I could find. Dang.

Maybe I can find a copy of that Roberts and Waters book.

I suppose I should also consider the Sharps action. Any opinions on its strength (In a modern version) compared to a Ruger or B78 / 1885.

Cheers,

Cody
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