I also went with a Timney trigger on my ruger mK II 338 win mag. I ordered mine from CI distribution out of Guelph as I am not to far away from there myself. Installation was fairly easy and simple, I did reuse the factory spring along with the new Timney trigger which gave a nice 3lb. pull weight. Just take your time when fitting the new trigger to the safety. I used a 1x30"'belt sander and file and everything turned out great, a definite improvement over the factory trigger. I had similar results with my 77/22, ended up with a 2.5lb pull weight which I am very happy with. I would not however recommend their ruger tang safety trigger as I experienced a design flaw with mine (although I did get it to work I just had to eliminate the bolt lock feature) it took more time and labour to make it work than it should have IMO.