Will a .244 remington shoot modern 6mm rounds?

[mackdaddy]

6mm is .244. .243 is .243. Same bullets. Slightly longer case length in the 6mm and 6 ° difference in the shoulder angle. I have shot .243 in the 6mm in a pinch but NOT vice versa. You can use .243 dies for 6mm if you neck size only.

Have been shooting both for many years.

[fly-by]

There are several 85-90 grain bullets designed for game rather than varmints that should stabilize in the 1:12 twist.  Berger #24524, Speer #1217, Sierra #1530, and a couple of others.  Midway has the Speers available at $25/100.

[lazydrifter]

6mm is .244. .243 is .243. Same bullets. Slightly longer case length in the 6mm and 6 ° difference in the shoulder angle. I have shot .243 in the 6mm in a pinch but NOT vice versa. You can use .243 dies for 6mm if you neck size only.

Have been shooting both for many years.

This is very bad information.  More than just a slightly longer case in the 6mm.  And how would it be ok to use a 243 die to neck size a 6mm with a 6 degree difference in the shoulder angle?  Your lucky you haven't blown your rifle up.

[Biggerhammer]

Hmmmmmm. I'll neck size 6mm Rem all day with a .243 Win die. With the die set right it works great, you can't get the complete neck but I don't size the whole neck anyway if being fired in the the same rifle/chamber.

A 7.5 or 8 twist and the right bullet is where it's at in the .243 Win chambering.