I need some help with my PC in .223. I can get it to shoot 77smk very well pretty much 1/2 moa rifle with that load. Problem is anything else is not very good. It groups right around a inch with anything else. 55gr bullets are even larger. 69gr smk work decent but not great. The rife wants to shoot triangle shaped groups except for the 77smk. I have a PC in .308 and that rifle will shoot anything from 130gr ttsx to 175gr smk into very small groups. the .223 is getting me down. rifle has around 200 to 250 rds through it. any advice would be great.