Maybe this has been previously covered, but I failed to find it. I have a permit to carry concealed, however, I occasionally go to a facility where I have to unload my handgun and secure it. My question deals with the fact that ammo may be chambered more than once before it is used and I am concerned that the bullet could incrementally become set deeper in the case. Eventually, this will cause an increase in pressure, perhaps beyond what the handgun could handle. I expect there will be some distortion of the ammo, though I ma more concerned with excess pressure. I have begun to mark each round that has been chambered with a permanent felt-tip pen and arbitrarily limit it to two chamberings and relegate it to range use. Alternately, I could use a micrometer to assess setback. Another possibility is to use a revolver when I must unload and reload more often. My primary handgun for carry is a Gen 3 Glock 27. I only fire factory ammo in the Glock, however, not all are equal in construction. Some may be more susceptible to to being setback during chambering; others may have features to be able to handle it. What are my options to address this issue? Thank you for any insight/advice.