Kirby, Kregg and anyone else using Greg's .705 reamer/mandrel. Question pertains to reaming through the front receiver ring as the reamer breaks through to the feed ramp on the lower, "thin" side. Have two actions, both 700's (both mine thankfully) that the reamer grabbed and locked up and leaving a nick in the top of the feed ramp on the bolt's bearing surface right in the middle. I've corrected the setup so this cannot happen again but requires a bushing be made for each action, not a big deal but another step none the less. The problem is with the front bushing and it being pushed out of it's support area on the bottom by the reamer flutes leaving the reamer "unsupported" on the bottom while still having to finish cutting through the top support another .400 or so further, not good. I made a threaded bushing to fit the receiver thread and shoulder up to the face and bored it out to .690 or so in case the threads were off axis, then I bored both ends out to .750 ID but leaving a .250 area in length immediately inside the receiver face that was still .690 ID that the reamer is forced to bore through before reaming through the front receiver ring, thus offering the support needed behind the flutes before they enguage the abutment area. This works perfect but, as you understand, will not work for any other action because of thread misalignment in every one of them is different. The threaded bushing is being bored out to accept "replaceable" internal bushings with the .690 ID so all I have to do is turn the OD and ID and part off to make a bunch at once. I wonder if you have found another fix to this issue of unsupport in the front ring and how you approached it?