This is covered in the FAQs, but the thread locker H&R uses is usually built up in the bottom of the holes and needs to be cleaned out until you can see the shiny bottom of the holes, if it's dull, it's still in there, if you don't the screws will appear to be tight, but they're actually not and the thread locker is preventing them from tightening the mount securely. I use an awl or a pick to remove the thread locker, then run a bottom tap into the hole twice to clean the threads out, then blow the debris out, when you're done, you can run the screws in and make sure they aren't too long.....many members have complained about the screws being too long or the holes too shallow, but I don't believe either to be the case.
Tim
