Re: TRG22 in 6.5x4.7
A buddy and I both had problems with our TRG-22 conversions to 6.5x47L.
With Varget, we experienced pierced or cratered CCI primers before achieving typical 260 velocities (2800fps-2850fps). Single round feeding was also a problem for F-Class comps. due to the cartridge being front heavy and tipping down with 139/140 pills.
While bushing the generous firing pin hole would have fixed the blown primer problem, I decided to rechamber to .260 Rem and haven't regretted it.
(IIRC Zak Smith also had blown primer problems with his AI conversion to 6.5x47L)