I have a Rossi 92 in 45 colt, and a Ruger Vaq. in the same cartridge.  I am now getting into reloading the 45colt and want to know if the Rossi is up to task of regularly handling the longer OAL & higher pressure loads that are  typically published for the Ruger. If not, what can the 92 regularly handle as far as pressure and OAL are concerned?  What pressures & OAL can other carbines (Marlin / Win 94) handle in this cartridge?  

Your Rossi 92 is the strongest of the litter of carbines for the .45LC cartridge by a fair margin.   Anything you can put through your Ruger Vaquero, the Rossi will eat as long as you want to shoot it!

The one drawback of the Rossi 62, is that it can be somewhat finicky about O.A.L.  And to make matters more confusing it is different with different vintage guns.   Sometime about five years ago, they changed the cartridge carrier, that part that lifts the cartridge from the magazine tube to the bolt when cycling the action.   On the older models it was a simple matter of milling back the stop on the cartridge stop on the cartridge lifter to gain about .105" in available O.A.L., but with the later guns, they for some reason redesigned the carrier, and this modification only succeeds in ruining any reliability of feeding it once had!  In addition, the older guns would feed a WLN profile with a .450" nose to crimp length with absolutely no problems... usually without any modification at all!  The later guns usually feed a .400" NTC bullet without problems, but beyond that can be very picky.

Sorry to cloud the issue for you on C.O.L., you'll just have to play with your own gun and see what it will digest.   But, as far as pressures, anything your Vaquero will handle, the Rossi will do better!

Hope this helps!

God Bless,

Marshall