My accuracy test ammo is 308 South African FMJ ball ammo. If any of my 308 rifles can be accurate with this surplus ammo it’s good. Haven’t seen any lately. Or test over the counter new ammo till you find one that’s accurate. In my 6.5 swedish Mauser the new s&b 131 gr sp ammo will shoot 1 1/2” 5 shot groups no scope at 100 yds. My Remington 700 in 338wm will put two bullets in the same hole at 100yds using new Winchester super X 225 gr psp at 100 yds.

Besides that the only way is to reload using match grade boat tail FMJ bullets. If it’s not accurate with new ammo.

My old 1972 western Auto Revelation mossberg 30-06 bolt action will shoot nickle 5 shot groups at 100= yds benchrested with my reloads if I do my part. Not bad for a $175 gun New with scope.

I made my own gun rests and pull the gun straight down into the rests at the sametime adjusting the rear rest till the sights line up at 100 yds. I used 2”x 10” fir vee shaped padded with old pants. And the rear rest is 2” x6” fir vee shaped narrow so it holds the rear of the stock, it’s padded too. It’s a rock solid rest.

Controlling your breathing is next. One deep breath, let it out, another deep breath let it halfway out, hold and shoot.

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Plant garlic in the fall