Rodan - Agree about the 457 triggers. They are nice compared to many others out there, but could be a little better when trying for real bench rest accuracy. I am going to try a replacement "Yo Dave" trigger spring kit first, as I have read numerous good reviews.
Another factor in barrel length / weight is barrel vibration. You wouldn't think it would be much of a factor with a lowly .22 rimfire out of a short, stiff heavy barrel, but it is, and can vary enough to cause accuracy issues with ammo the gun doesn't like. Maybe more pronounced with longer, thinner barrels? Seeing guys attach "Tuners" that change barrel vibration patterns to their heavy barreled guns, and subsequent better groups, especially with loads the gun didn't like before, clarifies this.
A note on ammo testing - Yesterday at the range I tried a box of RWS R50 ammo. After fouling the barrel, I got a consistent number of .275 / .325 inch 5 shot groups. Rifle likes this ammo. But at $21.00 a box of 50, the search continues. So far Federal GM Target and CCI SV are the cost effective go to's.
Larry
