I don't know about the autorims. But then, I don't know any 45LC shooters who shoot the autorim's out of their LC's either.
When I first bought my 10" 45\410 barrel, I picked up a box of factory 45LC just to satisfy my curiosity of how the 45LC's would shoot. Actually, at 25 yards, the darn thing didn't shoot to bad for a gun that had all that free-bore in it. It was certainly accurate enough to take a whitetail at 25 yards. But then, if I want to hunt whitetail, I have other handguns that will do a better job and at longer distances.
So, I use this 10" barrel for whackin nesting spring Starlings. Nasty birds those Starlings. They will drive every other bird out of their nest and just take over. Well....until they get a load of 410 birdshot!!!!
Dave