Bolt action 300 blk bore guide?

[Roadrunner1969]

Does anyone know where I can get a bore guide for 300 BLK bolt action?

[dellet]

Not aware of cartridge specific guide, but been a while since I looked. In a pinch drill out the primer pocket of a fired case to allow a cleaning rod to pass and call it good.

[Roadrunner1969]

Good idea. There is so little difference between the case OD and the bore that there is hardly any room for anything to seal the chamber.