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BOSS Shooting system

Is anyone shooting a Winchester model 70 with the BOSS? I decided to pull my back out of the safe after 20 years & find the “sweet spot” for some 180-200 grain ammo & am having a hard time. It’s not consistent with the old literature.

Just wondering if anyone out there was using it & what ammo they were using & they had the “sweet spot” set on. My dad used to have one that was tuned in back in the 90’s & it would shoot a 3 shot group at 100 yards with all the holes touching

Thanks!
 

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