Most top end pcp 10m rifles are capable of achieving high scores ,but when it comes to trying to shoot 250 x 250 with high X counts which a lot of comps are now decided on ,then I don't see the point of putting yourself at a disadvantage by using a lower powered rifle . Really it depends on how competitive you want to be.
If you look at the Winter league Div 1 UKBR22 25yd (AIR)results in both Light and Heavy Varmint you have to be scoring 249/250 and towards 15x on each card of which there are 5 to be in with any chance of a gong .
These scores are for indoor cards , the out door scores are usually a bit lower ,but not by a lot and some comps have been very close, the level of shooting in BR now is extremely high .