Quote Originally Posted by Texas10 View Post
That factory stock and that model (12FV) are typically capable of shooting groups well under 1 MOA ( one inch at 100 yds). That you installed a single shot adapter means you removed and replaced the action in the stock, so I'll offer some tips to make sure the stringing is not caused by improper installation.

When seating the action in the stock, stand the rifle on the butt and push firmly down on the barrel to seat the recoil lug, then snug the front action screw. Now look closely at the rear tang around the safety lever. Make sure the action is not touching the stock around the tang while you snug the rear screw. After you've confirmed the action is properly centered ( I slide a .005 feeler gage around and under the rear tang), tighten the front screw to 45 in lbs, then the rear screw to about 15 in lbs and recheck that the action is properly centered in the stock.

Moving to the firing line, shoot a 2 shot group. Use targets with a very small bullseye. I use a half inch circle drawn in pen line width with a tiny dot in the middle. The theory being aim small, miss small. Make up a target with many bulls on a horizontal line and photocopy it onto card stock paper.

Now tighten the rear screw to 20 inch lbs and repeat. Notice how the groups change in size and shape while you continue to shoot, tighten and shoot. Once the groups start to open up again, back off the screw torque and find the sweet spot again. Record that torque value for future use. It may change slightly when changing to a different load.

FWIW, my 12FV in plastic stock with Vortex AO Crossfire II scope will shoot well under 1/2 moa. When I moved it to a laminate stock https://www.eabco.net/Savage-Thumbho...6_p_14233.html the groups shrank to the mid zero's using the 53 gr V-Max.

Good luck and let us know if this improves your groups.
Maybe you hit it with one shot but missed with all the rest of them? lol