Charles Daly Zastava barrel 308 loads

[bsterns]

Has anyone loaded for a Charles Daly 308. The barrel maker is Zastava Arms and they will be supplying Remington with these barrels this year or next. I purchased one of these barrels since it was so reasonably priced and since I had an action and stock for it.
I have put the new 22" zastava 308 barrel on a 98mauser action and have glass bedded the action and free floated the barrel. I have had a real problem getting good groupings at 100 yds. I have never had this much problem with other calibers or barrels in general. It is supposed to be a 1 in 12" twist. I have tried 150 gr. Sierra BTSP. After intial failure to get any decent groups with factory ammo and spraying bullets all over the place, I put on new scope mounts and made sure everything was tight. Afterwards I shot the factory 180 gr. Winchester ammo and the grouping was about 1 1/2 inch at 100yds. I have attempted to shoot 150 gr. Sierra BTSP with varget powder and loaded 45,46, and 47gr. loads. 45gr. gave me 4 within an inch and the fifth one was way off in left field. The 46gr. and 47gr. loads were all over the target, 3 inch + groups. The stock is seated good and the barrel channel is free all the way to the front of the receiver. The scope has been reliable in the past but now I am paranoid about it. Any load advice for this gun would be appreciated.