There are many factors to the weight of an F-Class rifle. Some are: do you free recoil or do you hold the rifle in your shoulder or something in between, most use some kind of bench rest front rest but some use bipods...yes, in F-Open, not just F-TR. If you free recoil the balance of the rifle should be fairly uniform so that it rides the bags smoothly without jumping off of them. The caliber determines a lot of that. If you hold the rifle in recoil the weight can be biased to the front because you are mitigating recoil in the back with your hold, just be sure your hold is consistent. The scope can also mitigate some recoil if it has some weight to it. Just random thoughts here.