I was ordering a Feddersen barrel and spoke with a guy about this and that and he said they have had best luck with the rubber over molded Hogue stocks. He said it must have something to do with soaking up harmonics. He also said they need a little pressure on the fore end.
From what I've seen, they may be right in some regards. If just slapping a stock on a rifle and calling it good, the hogue works great for accuracy. I tried a few different stocks and that was the case with the hogue. I just hated how it felt (poor ergos). The comb was far too sharp for my needs, and it is too sticky when shooting fast from the bags and moving to hit multiple targets. Other hogue overmolded stocks on bigger rifles have been great though. The stock (Magpul X-22) I mentioned in my last post is one of the most popular stocks on the market right now. They have an insert where you can apply pressure to the barrel from a screw through one of the m-lok slots. I tried it and didn't get the accuracy I desired. As have some of my buddies from my club. We've all found out that upward pressure may work on a bone stock factory barrel, but it is not needed for a heavy barrel 10-22. Instead you glass bed the action and freefloat the barrel and accuracy is pretty decent:
Yesterday at a know your limits shoot, I sold an extra X-22 stock to a member of the club and he absolutely loves the stock. He did very well with it in the shoot as well. Surprisingly hitting up to 6 out of the 8 targets with a bone stock 10-22 made in 1964. 2 other guys and myself told him to leave the barrel tension insert out and try it with the barrel freefloating in the stock and it was shooting like a champ.. He said there is no comparison between the factory stock and the X-22. His buddy also shot the rifle and did well with it in the event.