I only shoot one round about every 10 minutes. As does anyone who knows what they are doing when shooting a deer rifle. The Rugers are nice but they just don't shoot worth a crap out of the box. I'll never buy another.
You did not say if your getting a build up of copper in the in the barrel first time out . Then I found the blue box of Federal in 165/180 gr. to start a new barrel worked out the best , and I never labeled a gun until I shot about a hundred rounds though the barrel cleaning it along the way .Done that with Browning / Tikka/Savage, as well as Winchester .
Some guys rushto get a new gun home- to take the stock off, and see if the stock is touching the barrel .Maybe you too might need to have a look .
After checking the rail and mounts to see if they are tight , and the barrel clean, I would give the cheap federal's a try, and see if the rifle will settle in .Then mass produced rifles coming off the assemby lines as new cars made in the last twenty years do have some quirks . Even the remington line I find .
The ruger Mark 2 my wife has is about fifteen years old . Other than some trigger work this rifle in 06, has always been a MOA gun .I have a tikka for a few years now, that never saw a screw driver other than to mount the scope . Never give up until you given it an honest try .
Another thing !!! I find I need to get used to shooting a different make of rifle .Hense the 100 rounds before I think of reloads . It gives the gun barrel a chance to settle down as well as the shooter getting the feel for the fit of the new gun .