Guess today was my lucky day. Went to drop some deed meat off at the processor which is a pro shop as well. Low and behold they had the 300 ultra on the shelf. It is a fine gun. It is sitting in the safe now!!
Call them to see if they have a more open channel available as they may. It looks like the apache at stocky's may be a good one if you are a righty. Another choice is to open the channel yourself or have a woodworker you trust do it if you don't trust yourself doing it; I'd call first and confirm the fore end is big enough to open up before you buy it though.I don't see any for heavy barrels.