Thanks Mikecr, dscully & gohring for the replies. I have to buy new dies for this cartridge, so I was trying to figure out the best option for my situation.
Mikecr, I agree...you would think the manufacturers could make a universal seating plug/stem? Maybe there just isn't a one-size fits all solution...it would sure be nice though.
dscully, if I already had a standard die set I would definitely try drilling the stem. I called RCBS today and they said, "if the bullets bottomed out in the standard die, you can send the die and a half dozen bullets to us and we will modify it for you." Not wanting to go through that process, I'll just buy a better seater with the correct stem.
gohring, I appreciate the Hornady recommendation; I'll definitely take those into consideration.
Thanks again,
Mike