That would make me nervous too. I have had mostly the opposite happen that slower powders worked better, but they worked well enough that I didn't try the faster powders.

I would see if some other changes doesn't get you the accuracy you are looking for. Keep in mind that with some rifles you are shooting the equivalent of a proof load before you see any traditional evidence of high pressure. I think the number of reloads is the only very definitive traditional test of over pressure loads. I still watch and head primers when doing work up but do not think of them as an actual pressure reading just a warning.

Also how much of a difference are you seeing? I will gladly give up a quarter inch of accuracy for safety and peace of mind.

"When you disarm the people, you commence to offend them and show that you distrust them either through cowardice or lack of confidence, and both of these opinions generate hatred." Niccolo Machiavelli