My 455 Tacticool shoot fairly well out of the box, a friend of my pillar bedded it and I took away some wood in the front of stock to make it free-floating (it wasn't really from factory). I would say that it did it a little bit more accurate, but not in competition class, 50 yrds range. A muzzle breake (did only find one for a .30 cal) did the trick, I tightend a 5 round serie down from a tight 1 MOA, to about 1,5 cm (+/- 0,6"). Are there any others that have experience of what is worth putting effort into?
I have tried quite some different .22 ammo, but SK Standard Plus as normal day to day/bang for the buck- training ammo and I'm now looking forward to test the new SK Long Range, they will start delivering now in May (fingers crossed) here in Sweden.