I picked up a used Savage 12BVSS varmint rifle awhile back and went out to the range this morning to see what it could do. I took a box of 45 grain Winchester White Box, 55 grain Winchester Super X, and 55 grain Hornady V-max. I started out with a 5 shot group of the WWB that measured .64". I gave the barrel about 10 minutes to cool and adjusted the zero on my scope. I shot another 5 shot group of WWB that measured .84 (closest to bullseye). After another 10-15 minutes cool down, I shot a group of the Hornady V-max that measured .58". Finally, I loaded up 5 rounds of the Winchester Super X. The Super X was noticeably louder, and the recoil was more intense. I stopped after 3 shots because I didn't feel right. I actually double checked to make sure the ammo was correct. The 3 shot group was 2.25". Any ideas?