I have a browning T bolt with a 16.5 " barrel ! It has a hogan moderator fitted which in total the length is around 20" ! In my opinion , the shorter total length out weighs the longer barrel for ease of use in a vehicle and looks ! I use my HMR out to 150 Yds realisticly and I never struggle with accuracy, and if I do it's down to me ! Generally the shorter barrel's are more popular these days, and in fairness , manufactures wouldn't make them if they didn't work ! I have a .22 LR cz with a 22" barrel, and that works well too ! Personal preference springs to mind !