Interesting that the thread morphed into conversions. smile

Random comments:

The .400 Corbon is a .45 ACP case necked to .40 cal, so you need a .45 ACP slide & extractor.

The 9x25 Dillon is a 10mm case necked to 9mm, so it could work with .40/10mm slides.

I had a .40 S&W Double Eagle for a while. After I fixed spring & extractor problems, I noted that it fed better using regular 10mm magazines, as opposed to the shorter .40 cal mags - so you might try std 10mm mags with the .357 Sig.

I was told years ago that 9mm & .45 Colt Commanders share the same ejector and frame ramp, so one can theoretically just swap top ends & slide stops. This Commander:

[Linked Image]

came to me as a parts gun in .45 ACP. I found a 9mm slide, fitted a 9mm barrel, and it ran perfectly fine.

I prefer ramped barrels in frisky calibers:

[Linked Image]

blush grin


"...the designer of the .270 Ingwe cartridge!..."