Thread: tight closing the bolt

Originally Posted by grandpamac

Greetings @Bill999,
Making .280 Rem brass out of .270 or .30-06 cases is not as simple as making 7mm-08 cases out of .308 cases. The .280 Rem is over 1mm (0.050") longer to the shoulder than .270 or .30-06. If the later cases are just FL sized in a .280 die this will produce a case with grossly excessive head space. The correct method is to neck the .270 or .30-06 up to .35 calibre and then size with the .280 die just enough to chamber to fire form the remainder of the shoulder to its correct position. I am not surprised you had problems. It is not even worth considering if you can buy .280 cases.
Regards Grandpamac.

I found that out the hard way mate but its great to have it confirmed
I was necking up to 30 cal after that then back down to 7mm but it wasnt enough


only about 3 out of 30 blew primers but the first was mild and the third was frightening

Highly unrecommended that's for sure