Don't give up. I bought this old German 300 Wby. It had been through 4 owners and no one could get it to shoot. They all believed the garbage about Weatherby's not being able to group. Especially skinny barreled wood stocked ones. All I did is give it a thorough cleaning. Loaded up some full house Weatherby spec loads. 180 grain Partitions going out of this 23" barrel at 3250, mounted a 6-18 Leupold in Burris rings. The trigger is still at it's factory crisp 3 pounds. This rifles reputation was so bad I got it for $295. The last owner couldn't keep it on the paper for more than one shot! I bought it to rebarrel but...........This is how it typically shoots for me. This barrel goes no where!
Not quite as good as my Rugers but good enough for me to buy 2 more Weatherby's. I'm thinking the recoil of the 300 Wby may have had a slight affect on the previous owners marksmanship.
Here is a 3 shot group out of the same rifle.
.569-.308=.261" That works for me. When I showed it to the previous owner guess what? He wants it back. Not gonna happen.