I'm trying to get some advice I'm trying to get a heavy slug for deer hunting in my Benjamin bulldog to perform I wanna shoot a 142 grain slug but when I crashed over 125 the bullet jumps right about 6 inches too far for me to bring back with the scope adjustment. Does anyone have some advice the guy at the range at the shooters bench air rifle range that I shoot at suggest that maybe the twist in my barrel is not fast enough to stabilize the bullet any thoughts on this when I see the gun on YouTube videos it seems to shoot 145 grain slugs no problem