I'm curious about the "blowback" you mentioned Widder. I have a 1894 in 357 and reload for it. A week or two ago I was testing a few 158 gr. Missouri Bullets I'd just gotten in with light loads of Unique (I think it was) and a couple of rounds of the empties I picked up were black down one side. I don't recall anything different in them when they went off. Just curious, don't mean to hi-jack the thread. I will say that I love my .357 Marlin and it's a blast to use for plinking and it works fine on whitetail (to a limit), but I too have been wanting a lever gun in 45 colt....because I don't have one.For CAS using the .45 Colt, mild loads will give you some blow back, depending upon just how mild your ammo might be. Alot of Cowboy shooters who use the .45 Colt in the 1894 will tell you that the heavier slugs (250 grainers) will stop the blowback, if the velocity is atleast midrange. And anything less than the 200 grainer can give you very noticable blowback.
This blowback doesn't seem to occur with the .38/.357 mild loads.
That makes sense to me, first time it ever happened to me though and this thread got me to wondering if that is was it was. I'll just crank them up a little and put an end to that nonsense.The 'blow-back' results from light powder charges that do not expand the cases sufficiently to seal the chamber walls. This lack of sealing allows gas to escape along the cartridge case and into your face if you are a left handed shooter. The 45LC 1894 is a sweet combination. Look at the range of bullet selection - all the way from 185gr 45ACP SWC to 300gr hollow points.