Originally Posted by USMC 338
Sorry let me clear things up a bit just wanted to know if the shoulder is different or the neck one longer than the other? there can't be much differance between the two.
The case is longer on the .280 by ~.040". The length to neck/shoulder juncture on the .280 should be around .018" longer. The neck should be shorter. Of course this all depends on who's reamer it is and who cuts the chamber/sets headspace.
Plus, I believe there are saami specs on the 6.5/06 but maybe not.
You can use these guys to explore case specs:
4-D Products Rentals
Personally if I was going to do a wildcat like this one I would base it on the .25-06 case for simplicity of case prep. One pass through the resizer for neck expansion, load and shoot.
My 6.5x.257R Ackley has that advantage.