I'm in the middle of putting together a rifle for P-dogs and am having a real hard time deciding between the 22 BR using a 40 gr. Nosler BT and the 6mm BR using the 55 gr. Nosler BT. The rifle is a Savage 12 Low Profile Single Shot. I have ordered a Shilen 26" heavy sporter barrel for the 22 BR but I keep having second thoughts about the 6mm BR. Which would really be the best of the 2 calibers. I like the light bullets so hits can be seen but I have 7 22 cal. varmint rifles. Have a good shooting Ruger No.1 in 6mm Rem. that I use those 55 gr bullets in but haven't taken it over to Montana as yet. Can you guys help me make the right decision. I still have time to call Shilen and change the barrel specs. Told me there was a 15 week lead time on the barrel. Help!!!