Jeff,
I plan on using the 30/30 spitzers, in a lever gun(only ONE in the mag. at a time of course). As far as length, I might be able to set the bullet on a charged load, and slip it in the gun, then close the chamber slowly to allow the rifling to set the COL. I can always crimp it using the Lee factory crimp die. I have 165 gr., 168 gr., and 180 gr. .308 bullets to try. I'll let you know how some of these 30/30 test loads shoot. My .223, is now shooting, very close to yours since I added a 6-18x50 scope on it. I added weight to the stock, ala the Buffalo Classic, and that has helped settle it down off the bags.
Don