Other than factory ammo is there a good reason for the 6.5 PRC over the 6.5 RSAUM? My 6.5 RSAUM w/26" Bartlein 8.5 twist is pushing 147 ELD M's at 3,091 fps and there doesn't look to be a whole lot of difference in the two cases. It was extremely easy to load for and while I prefer the necked...