I notice that PTG no longer will make coned bolts for Rem 700's. They site unsupported area. I've heard grumblings of this concerning Tubb guns as well. Question is how has the Kelby action and other custom actions that produce coned bolt actions been able to get away with this design for so long. You don't find any higher operating pressures than in the benchrest game. I have a PTG coned bolt and have not experienced any problems and really like the ease of cartridge feeding.