P.O. Ackley describes shooting 30-06 through a 6.5mm Japanese rifle in his books. Several shots if I remember properly before the bolt locked up.
And I said "to heck with the rifle give me the cases"; and then I asked how is it possible to chamber a 6.5 rifle to 30/06 with a reamer with .300" pilot? If the reamer had a 6.5 pilot the rifle could be considered a 6.5/06 and I ask; how scary is that? Most reloaders are familiar with the 25/06.

The North Texas shooter chambered a 308 W into a 25/06 and the kibitzers were betting on how long the bullet was when it cleared the barrel. And then there was the case; what happened to the case was beyond most members ability to comprehend.

F. Guffey