Originally Posted by
The Virginian
Proofing with .45 ACP does not show the accelerated wear and eventual damage on the hinge and lock up that a Webley Mk VI will suffer with a steady diet of .45 ACP ball. The heat treatment of the US guns was much different than the Webleys and whilst the cylinder may be thicker, the steel is not as strong. The standard lower pressure for .455 compared to .45 ACP should speak volumes as to why it is very poor judgement to do it. Stick with the mild handloads with lead bullets in cut Webleys and you will never have a problem.