Re: Accuracy & Power at Long Range?
338 Ultra and 250's for Brown Bear.
Stay away from the belted cartridges. They are truely an inferior design for the handloader. At some point you will need to size the belt down, which can't be done in a FL die. It, and/or the spot immediately in front of it will get too tight and need to be sized, non-belted case do not have this inherant problem.
30's are cheaper to shoot and would be my choice, but for Bear I like bigger than 30.
7MM or 300WM would be my last resort.
necking up to 338 from 300 will make a longer neck, moving brass from the neck/shoulder junction up into the neck.