My son has a long action Remington chambered in the 7mm rsaum to shoot the 180's seated out. He was looking at the HS precision 3 round clip and bottom metal. I was wondering if anyone has dealt with this combo and could help us out on which HS mag we need. They offer the 300 Winchester and the 300 ultra mag clips to possibly choose from on our application for the 7mm rsaum. The 300 ultra looks to be more of the straight case size as the 7mm rsaum and was wondering if this one may be the ticket. I'm going to give HS a call and see what there recommendation is as well. Thanks Bill