A barrel burner is a cartidge that when loaded to full speed potential and used with a high rate of fire or frequency it will ruin a barrel very fast. I consider barrel burners as cartridges that will never see 1,000 rounds before the barrel is completely shot out.
Doesn't mean you have to shoot it that way. Like I said, you can shoot it occasionally with short shot strings to make it last.
Of course you can load the 264 down to 6.5 CM specs to save barrel life, but then what in the hell is the point of building a big 6.5???
My point was just to.make people aware that they can't take a 264 out to the range, load it up to 3200+ fps with 140gr bullets and start shooting targets all day long all the time. I've shot out 6.5 barrels with fast catridges in less than 600 rounds doing just that.