I have traveled with checked firearm's many times, both long guns and handguns. Never any problems except once at SFO when ticket agent demanded I take my colt series 70 out of the case and rack the slide to prove it was empty. To avoid being shot by a LEO I asked that one be called, I got 4. They were very professional, confirmed the weapon was empty, told me they appreciated the heads up and sent me on my way.