I have a Thompson Contender with a bunch of different barrels. One of the barrels is a 45 Colt/410 Shotgun. When shooting 45 Colt it is not very accurate because the bullet has to jump a big gap before it reaches the rifling. That is obviously because the 410 is a much longer case. Well I have been thinking of a way to make an extra long case to use with my 45 Colt loads. I have tried a few cases without success. But I was in a pawn shop the other day and saw a ziplock bag with 10 long cases in it. Out of curiosity I picked it up to take a look. 460 S&W!!!!!! I bought the bag for $2.00 just to play around with it. When I resized the case it slid right into the chamber of my Contender. So I loaded up 10 rounds of 250 grain bullets with magnum primers and 6.5 grains of Titegroup. That is a very low pressure load for a Contender. My Hodgdon book shows a starting load of 8.0 for a 240 grain bullet. So I have no doubt this will be safe. I hope to get to the range to test it out later today. But I thought I would post this as a word of caution to anyone that owns a Judge or a Governor. I was able to chamber a 460 Smith & Wesson in the chamber similar to what you have. I would be concerned that if someone inexperienced were to be with you while at the range had access to a 460 S&W round they could easily blow up your gun. Here are a couple of photos just for a comparison.