So I recently put a McGowen 1-9 twist .223 barrel on one of my model 12's. I assembled this rifle and had never shot it until yesterday. I didn't have any ammo loaded up so I bought some PMC 55gr fmj to plink with. I sighted the rifle in at about 30 yards and things were looking good. Went out to 100 yards and I'm grouping about 3-4" with no consistency. Is the 55gr bullet the wrong weight for the 1-9 twist? I just moved so I don't have all my reloading stuff set up yet so I haven't had a chance to work up a couple loads. Everything is tight and I know the scope is good since I took it off a different 223.