A lot of 22lr ammunition (according to the JB charts I've done) are 'transonic' anywhere between 50-70m. It really surprised me how quickly they dumped velocity after the 50mark.
One of my 22lr will shoot tight to 50, well enough for reliable kill shots to 70-80 but trying to group at 100 is all over the shop!
My theory is it is losing stability at transonic, which only effects it slightly by 70m but by 100m the unstable bullet can be anywhere in an 6" diameter due to a varied level of instability (yore & pitch) which is also effected by slight changes in conditions during and after the transonic phase.
Haven't tried any subs or target ammo as variety is pretty slim locally.