NitroX

30 Flanged Super (.300 H&H Magnum Rimmed)
is a hell of a cartridge to chamber for due to pressure.

H&H Rifles are notorious for this, hence why Holland
always used the Reinforced action for them - or generally.

I just sold one so may have some bits and pieces left
if you do rechamber one - PM or email me and I'll
see what's around.

500 Nitro