I have one in .308 pretty accurate gun, with that said the fault of this rifle and others like it is a thin barrell which will heat up on you quick. Mine has a good stock for a gun I got used in 1986. The stocks are soft and get bent places on the wood easily. I put a timney trigger on mine helped a bunch the trigger had terrible creep. After that the factory stock was tight on trigger assembly (soft wood = easy custom fit with sand paper and restain.
I would check if your bullets walk as barrell heats up if it does may be hitting stock also how does your rifling look do a good cleaning for lead and copper fouling. I used windex then cleaned as normal. Hope this helps
chris