I did most of the easy tunings you can do to a Swiss K-31.I also mounted a clamp on scope mount with a nice Bushnell target scope that I had. We did the range today at 100 yds using a load of 168 gr match kings & 43.9 grs of IMR 4064. I left the range pretty happy. Once I got the scope clicked down it was an inch or maybe under bagged and benched. The group did not move as the barrel heated...I liked that. My range backstops at 200 & 300 yds are better wind protected than the closer ones so next trip we will try further. The triggers on these rifles are SO sweet.and predictable.