I've got a 35 rem Contender barrel that I think I would like to have converted to taked a rimmed case. It is my understanding that one could use 30-40 Krag or 303 British brass, formed in a normal 35 rem size die. I think normally that the brass is trimmed back to 35 rem length but I was wondering if I could have the throat opened up to keep the full length of 303 brass. This would make case forming that much easier, get rid of the poor factory throat, and make a nice, long neck for boolits. Anyone else have this done? Who would you recommend to do the work, especially someone on the forum that understands boolits for the throat?