"effectively double the chamber strength in .45 Colt. "
My point continues to be: "Pretty optimistic. Stronger sure. But all the Ubertis and the vast majority of the USFA guns use the same larger cylinder and window dimensions."
Early 1st gen Colts were malleable iron cylinders and a RC of 22-24. Intermediate Colt guns with later formulation carbon steels went from RC24-30 over the next century. Current Colt and some of the better imports, including Uberti using modern US chrome moly steel or similar European steel, RC test at a RC 30-35 and have as early as 2000 and before.
So while the bolt cut and cylinder on a .45 added .010" on a USFA, and are indeed stronger than the
originals Colt's....the USFA or Uberti cylinder's (which are one and the same for this conversation for steel quality and pressure) is no where near capable of handling "double the chamber pressures" of even the original .45 Colt loads.
SAMMI spec on the original .45 Colt is 14,000 psi. 44 Special has even more steel in the cylinder obviously and why Elmer used the 44 Special instead of a 45 Colt. Even Mr. Pearce limits the useful pressure in a USFA .44 as 22,00psi there.
http://www.goodrichfamilyassoc.org/44_Special_Articles/Brian%20Pearce%20on%20the%2044%20Special.pdfDon't get me wrong, the USFA SAAs are nice guns. I have owned a number of them from the US gun's inception. Love them. But the original SAA design, even with an added .01" is still by comparison, to almost any modern revolver, a weak and obsolete design.
I would think one would be hard pressed to find a traditional SAA from USFA chambered in .44 magnum. Or any USFA 44 mag. besides the heavier framed Shooting Master. Please correct me if that is my error.
From USFA at the time...on a "Shooting Master Model"
Manufacturers Description
The USFA Shooting Master is a single-action revolver chambered in .357 Magnum. Features include:
◾A beefed-up frameand that was required for just the .357 that runs @ 35,000 PSI. .44 mag runs @ 37,000psi.
and a typical SAA frame size from USFA