I'm pretty sure if you get a .460 barrel, it will shoot .454, .45LC, and .410 shells. I would contact TC and get it in writing before shooting anything other than .460... just to be on the safe side tho.
Man... went to the range today and touched off 40rds outta this thing. I got the M8 scope sighted in, and I'm able to put it in like a 2-3" ring at 25yrds. So far its up to the task, no broken glass, but I need to blue locktite like every freakin nut and bolt on the thing to keep it together. I gotta bring a toolkit to the range to tighten up everything after a few rounds. Luckily I had some foresight and put blue locktite on the scope base.
HAHA... I catch myself flinching when shooting it tho so it takes a lot of concentration and controlled breathing to stay on point. I forgot gloves and got a little blister on my trigger finger. You gotta hold it like teacup style so your weak hand index finger doesnt get bit by the barrel release tang. What a freaking beast tho... wow. You can see the lane walls move when you touch it off. Fire shoots in to the adjacent lanes, HAHAHAH! The RO at this range was happy when I put it away... he was tellin me was making his heart skip a beat.