Mine started out as a 300 Winchester Magnum. I never could get it to shoot any tighter than three quarter MOA. You could feel a really rough spot with a patch about halfway down the bore for two or three inches. I finally replaced it with the 7mm. Remington Mag tube from Shilen. Chrome moly & hand lapped seems to be doing the trick and that's with the barrel nut. Boyd's stock and Rifle Basix Sav 2 trigger finished it out. The only thing left of the original rifle is the action, recoil lug, and barrel nut.
Was the Shilen prechambered?
What twist?
Have you tried the 180 VLD? I have a 7 STW that really shoots them well.
Ben
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