Quote:
Originally Posted by Muley Gil
Back in the early '70s, I only owned two cartridge handguns: a Ruger Blackhawk in .45 Colt and a Webley MK IV in .455. Don't know how I did it, but I was able to deepseat SWC bullets in .45 Colt brass and fire these in the Webley, using reduced powder loads, of course. I guess the headspace was a little slack at the caseheads.
Later, I found loaded CIL .455 ammo and used .45 ACP dies to reload the round.
|
Hi Muley Gil,
Someone may have bored the 'step' out of the Cylinder Chambers/Bores, Bored them straight through to the same diameter as their Chamber portion then...since, the .455 Cylinder should have had a 'step' occuring roughly where the end or mouth of the Cartridge Case would be or a little past that anyway, thus incidentally preventing any longer Cartridge Cases from being chambered.
But, thinking on all these things now also leads me to want to review the respective rated or 'SAAMI' Pressures for the .455 Webley Cartridge, and, the .45 ACP.
If memory serve, 'SAAMI' Pressure allowance for .45 ACP is around 21,000 PSI.
Does anyone have data for the WWI era and there-after .455 Cartridge?
I am thinking it is likely around 16-18,000, but, this is just-a-guess...and it may not be as high as that.
Be nice to know, especially as regard or in respect for the British Revolvers.