RE: bullet size for elk hunt
If it were me I would shoot one of the big conicals in the 400-600grn range if these were accurate in your gun. On the other hand the biggest bull elk I shot was with the 300grn sst. I know they say that the 348grn powerbelt is the most popular bullet for elk in Colorado. If it is accurate in your gun the 348 or 405 would work good.