Now that I have a 45 caliber suppressor in the safe, I have been toying with picking up a single shot break action in 45-70 and having the barrel threaded. I figure there aren't many problems which can't be solved with an extra wide meplat in front of 500gr of alloy going 1000fps. I was doing my due diligence and checking to see how much I would be able to afford to shoot the thing, and I haven't seen a single piece of brass in stock anywhere.
How long has it been like this? 44mag and 45 Colt are available, but 454, 460, and 45-70 are just not to be had.