Guys--
I have a 6.5/284 being built right now on a M721 action(no sleeve). I had hoped to use NightForce tapered bases and NightForce rings but I remember seeing somewhere that the earlier M700s had a different rear reciever bridge height than the current production models, which my bases are designed for. This causes binding of the scope tube. Will this be something I have to worry about with the M721? I think the difference was about .017" --too much to lap out. I plan to lap the rings, just wondering if I'll need to make a shim, too?

If it were me, I would assemble the bases to the reciever, install and align the rings, remove the upper half and check the height differences with a good straight edge. This may give you a direction. Tim.

Thanks, Tim. I think the problem I remembered was a bad run of Redfield bases, not actually a receiver problem. I talked to several 721 owners with the same type setup and they had no problems. Thanks!!