I mostly load Speer Grand Slam bullets that have a flat base. I just loaded some 30/30 and decided to bell the case mouth a little to help with bullet starting since these rounds needed crimped as they are for a tubular magazine. Well the bullets are a lot easier to start and of course there is very little copper shavings. So I got to thinking that belling for other rifle calibers would probably help out but I'm not sure if I would need to set the crimp on these to remove the bell or if I keep the belling light I would be alright without a crimp?