I have been getting rid of some guns that I don't figure I will be shooting any more. My M10PC in .223 never shot well. The sweet load just didn't seem to be there. Several times I have thought of using it as a donor, but .223 short action just didn't lend itself to my builds. It's been a long time since I took this slug to the range so I cleaned it and checked my logs to find a good load. None that I had on file showed much promise. Most were over 1 MOA and some were all over the target. Googling turned up 2 remedies that I hadn't seen before. The first was a long front sling swivel screw long enough to touch the barrel. The second was the accu- wedge stressing the action. When I checked mine, there was a small but deep scratch where the screw hits the barrel. It was either not quite touching the barrel and hitting it from recoil or the barrel distorted a little when it heats. I checked the free float with a dollar when it was newer, but it could have changed closer to the screw over time. The screw was easy to shorten in place with a Dremel tool. Range testing will see if this helps. I will wait to check the wedge. You can find most anything on the WWW. I might keep the 10PC after all. This may apply to any accu-stock since the screw is tapped into the front stiffener.