I have a set of JGS reamers for a 300 Remington Ultra Mag. One is a finish reamer and one is a semi. The semi can be used for making your own dies or for cutting the chamber under sized to keep wear off of the finisher instead of step drilling. They are brand new, never used. They take the pilot bushings (live pilot). $140.00 for the set tyd to the lower 48.
The finisher is factory spec. Not interested in breaking the set or trades at this time. Thanks-SJ