Trailor. The 6.5 Rem Mag was created by necking down the 350 Rem Mag. Both came out in the 600 Series Remington rifles quite a few years back. They are now being chambered in the 673 Remington rifle.(I think thats the right model No.) It weak point is a short neck that requires robbing powder space for bullets over 120 grains. The 260 will generate about as much velocity as the 6.5Rem Mag, As will the 6.5x55. The 6.5-06 would outdo it. Every road I start down with the 264 seems to end up at the 6.5-06.
Thanks for the tips on brass. I keep forgetting about Graf and Son.