6-48 screws just dont have much meat to begin with. if your a heavy handed like me i would invest in a wheeler fat wrench to give the proper torque. putting a drop of oil on the threads helps tension and torque the screw properly.i like to run screws through all the ring parts to check for problems and smooth out any burrs that may gum up the works. also maybe investing in a good replacement screw kit like the leupold screw set kit .ive had issues with cheap rings as well as pricey ones.