ajshootsI hope not to ruffle feathers, but the fact remains that there is alot of BS on the forums regarding group sizes. If everyone shot as well as they claim to shoot day in and day out, BR and FT results would be much different than they are. There are a number of highly talented shooters that grace this and other forums, but the average airgunner simply is not as good as these folks. The guys that take precision shooting very seriously have highly tuned guns and use only the best pellets and they are usually sorted or sized in someway shape or form.
Another key element to repeatable long range accuracy are wind flags. Pellets are highly effected by even the very slightest air movement. I don't see how the average, to slightly above average shooter could possibly expect to shoot well without them.
Rests... there is a reason that when you attend serious BR competitions, many and in some cases all competitors have rests that cost as much or more than some people's guns.
In regards to the OP, many guys that strive for 100 yard precision are shooting .25 and .30 calibers. Typically, these will have better ballistics than a .22 thus easier to obtain good 100 yard groups.
My own quest for 100 yard airgun precision did payoff after alot of hard work. Between tuning guns, barrel work, pellet sizing, and tons of practice, I put together a good number of groups that I will always be proud of. In all honesty I have never been able to shoot moa or sub moa group after group after group. There have been what I consider to have been great days but those days are far fewer than the not so good and even terrible days.
Alot changes as range increases from 50 yards. I find it rather easy to shoot moa and less at 50 with capable guns. I still tend to shoot very good averages at 75 yards. 100 however, as I stated above is just not daily moa or less groups. While I don't doubt that there are very talented and hard working shooters that probably shoot 2 to 3 times better than I ever will, just remember anyone can be whatever they want on the airgun forums!!