I got a box if .338 250gr grand slams from a friend of mine to try out in my 338-06. After doing some load work I got the rifle to shoot .75 groups at a hundred yards at a max load with Rl-19. I chrno'ed this load at about 2548fps. I was thinking about making this my 300 yard and closer moose load and bear load. I just havd no experence with these bullets and was wondering if anyone has any reviews/ performance results pushing these bullets at these speeds. Any insight would be great.