Hi guys got a B525 with the Browning adjustable comb , the one where the adjusting screw is in the top of the recoil pad. I am sure the system is in use in all 525/725 guns nowadays that are adjustable. However I find that after a while if I raise the comb it gradually slips back no matter how hard I tighten it. I now have reverted to using spacing washers, a bit of a faff but it has cured it. Just wondering if anyone else has found the system slips down after a while if used without washers.