ORIGINAL: Reefdonkey
Keys,
Are you sure about that? Because the only difference between the .270 and the 30-06 bullet is the diameter of the neck and the bullet itself. Other than that the casing dimensions are the same. I neverthought of it as a defect, because I know of other instances where this can happen. For instance my Sig pistol is a .40 S&W, however the same clip is used in both the .40 S&W and the .357 Sig. Actually you can buy a new barrel and convert from one caliber to the other. Plus, I am pretty sure that there is nothing wrong with the gun. Making sure that you have the right ammunition is one of the NRA’s “Ten Commandments of Firearms Safety” for this very reason.
Yes, I am very sure. A .308 bullet will not go into a .277 throat, and the .270 case has a longer neck than the .30-06. If headspace is correct, a .270 will not chamber in a .30-06. And, you canimagine what would happen if a .30 caliber bullet was fired into a .277 barrel.
By the way, the .280 Rem. and the .35 Whelan are also based on the .30-06 case, and, in a properly chambered and headspaced rifle,they will not chamber into any of the other calibers.