I have a 1 1/2 year old NEF 243 standard barrel on the SB2 Frame that has about 200 rounds thru it. I followed break in directions but have not done anything to it besides cleaning. I shot two deer this fall using Rem 105 gr. extended range ammo. I want to take my son coyote hunting now so I picked up some Federal V-Shok 70 gr. Nosler Ballistic Tips and some Federal Power-Shok 100 gr. soft points for deer hunting later. I started with the 100's and made a nice group but 5 inches high. After correcting and getting a nice group I tried the 70's. They were also 5 inches high so I made further corrections. Happy with that group I cleaned the gun and fired 3 fouling rounds using the old 105's to get rid of them. The first one may have been a flyer or just too low, but the second and third were one inch apart but 8 inches low! (I guess that is consistent). I know different ammo behaves differently and lighter bullets fly faster and fall less but 8 inches seems like a lot! What do you guys think?