I just got a 20 inch barreled 788 for a large sum of 307 dollars. I am used to 26 inch barreled .222's. I tried chronographing a 50 grain prvi partisan load through it and it only went 2780. I did throw 3 of them into a half inch group though. What kind of velocity can I expect with a 50 grainer and a 20 inch tube? Should I use the same powders that I used for the 26 inch tube such as Re7 748?
