Oh, I'll likely cut down some 45 LC to get me by til Rusty gets some 45 AR brass in.
I think the local gun store has some LC there. I'll knock out the bullets ( and re-use after),trim it back, thin down rims and throat and reload with an LC holder and ACP dies.
Never have been afraid to mix and match a bit when it comes to odd rds & reloading. Can reload 9mm Steyr with 9mm luger / 357 mag dies mix and matched. It's surprising what will work to reload oddball stuff.
tokguy, I can really understand your enthusiasm but your lack of perception as to what is necessary here is going to cause you a lot of grief.
I have an old bud that is doing what you are. He is not seeing what people are explaining to him, very well.
Please don't get the idea I'm calling you stupid or ignorant. I'm not. I'm sure you understand the concept but just aren't seeing the picture. I am guilty of this myself at times.
The 45AR cases will give you the same problems as 45LC cases or 45acp cases on half moon clips. The rims will be to large to allow the cylinder to swing into place in the frame or if you manage to force it closed, allow the cylinder to rotate.
As purple and others have mentioned, if you want to shoot the TL, you will either have to bite the bullet and purchase purpose made .455 brass or cut down the cases mentioned. It has to be done right, or they won't work.
If you cut down the stamped, face side of the case, your primer holes won't be deep enough and likely the case will be ruined. You need to thin out the rims from the underside, up to the case wall. None of this is rocket science. If you own an electric drill, with a chuck large enough to hold a mandrel that is sized to hold the inside of the case firmly enough so it won't spin, all of this can be accomplished with a file. As for trimming the cases, this can be done with a hand held pipe cutter available at any CT for around $10.
You can even make up the mandrel in the drill press with some due diligence.
