For you experts out there...I went to the range today with my .270 Abolt. I have only shot Federal XLC xbullets out of it but since i didnt want to spend alot just to target shoot , i got some Remington 130 gr PSP Core Lockt Express. Last time i shot my rifle at the range with the X bullets it was dead on at 100yds. Well the remingtons didnt shoot that well. It is shooting about 3 inches low and 2 inches left grouping about 2 1/2 inches. What my question is can ammo affect your accuracy THAT much? Giveme your experiences. Thanks guys.