My BIL managed to touch off a .338 Federal round in a Model 700 chambered for 7 mm Rem Mag earlier this week and somehow walked away unscathed. Apparently the gun is toast though as he had to interrupt his elk hunt to go buy a new gun. It's a shame as it was one of the blued stainless barrels that Remington produced back in the 70's I think and was a heck of a nice shooting rifle.
I didn't know that a .338 projectile would squeeze through a .284 hole without causing a whole lotta ruckus on the action end but apparently he nearly hit a coyote with a really long & newly sized 7mm projectile!
A good reminder to clean out the pockets of your jacket, vest etc. if you tend to shoot multiple chamberings on the same hunting trip!
I zipped a 270 WSM round through a 300 WSM at the bench by accident once. Other than making a strange sound and producing a different recoil signature it was pretty uneventful. I make a habit of double checking headstamps when firing multiple guns from the bench now.
