I have a custom .243 winchester. It has a bull barrel and a custom trigger(that i think is a little to light of a pull i).I have shot to 400 yards with this gun and i made a 31/2 group with it, and i am not the best shot neither. This gun has blown hogs apart at 400 yards using Hornady 58 gr V-Max Moly. I also like to shoot Winchester Silvertips. My gun hates federal and will not shot good consistent groups with it. For deer I like to use 100-grain spitzer's from nosler. I also havent shot at a deer over 150 yars even though i am sure it would work good out to 300 yards but i might think about that one. I wouldnt want towound the deer.