You're welcome.
You don't have to cut much, in fact if you cut too much you can make the end of the case sharp enough to cut yourself... Just a little is all you need, to break the edge of the mouth. Just experiment a little bit and see how it works. You'll have it figured out in no time.
Ok, then the seating plug doesn't fit the bullets quite right, or the sizing die is working the neck down too much. The ring is unsightly, but shouldn't hurt anything.
i figured it probably would hurt anything, but like you said, its unsightly. thanks for your help stormrider. i contacted rcbs about getting a different seating plug for $20 so i may do that