Thanks guys, I like the KISS idea, it seems to fit me.
The box was built with some adjustability in mind, it's deeper than it needs to be so blocks can be added to raise the torch. If you look in the first photo you'll see the bottle is sitting on a 3/4" piece of plywood. Also the top piece that has the hole for the bottle can be moved from side to side if needed and the stops for the drill can be moved also. My thought were to leave the drill in one place and adjust the bottle as necessary. I plan on putting a piece of masking tape on the bottle where it comes through the top so I can put a witness mark on it and the box so the set up will be the same every time.
74, it's about 1 3/4" from the end of the torch to the center of the shell holder. That distance will be dependent on the flame.
elf, for longer or shorter cases the drill will need to be moved back and forth. It's set up for 260 and 22-250 now, for 22-250 all I have to do is rotate the torch just a bit. Out of curiosity I stuck a 30-06 case in it, the drill will need to be moved back about 3/8". The only reason I see to raise the torch would be to heat the case quicker, something I'm going to try.
I had an idea to build something like this so I set it up on my welding table and experimented with different heights and torch locations. When I found something that worked I took the measurements and made the box. I ruined several cases figuring it out but in the end it works well and was cheap to make.