Brass life should not be an issue. After an inital sizing, you are only sizing back to 'sized 30-06' for a base line and 'fired 30-06' after use. You would not be working the brass any more than any 30-06 brass would be. I can't see as accuracy would change, what the rifle likes, it likes. The advantage would only be more positive extraction, maybe. I don't own a 30-06 barrel yet, if I did, it would already be on the way to you just for the fun of it. However my 7-08 as a 'rimless' case has never had any issues with extraction or ejection (I've owrned both), so H&R seems to have their extractors working very well indeed. Personally, I can't see where a rim is needed, but it would still be fun to try. I've often wondered why they didn't offer the rimmed Marlin rounds when Marlin owned H&R. It will be interesting to see what happens, or how long it may take to find a load that the rifle likes in the rimmed brass, or if good loads in the '06 will transfer right over and work the same with the rimmed. 44 Man
By the way, what base brass do you use for a '7-08' rimmed case?