On a hammer gun make certain it as an adequate barrel check, many do't. I have a H Pieper, Modified Diana which has the lower rib & forearm lug loose because it had no barrel check. This could as easily occurred from carrying it open or simply opening it too had, I have no idea which.
Personally I "NEVER Ever" carry a gun open afield, either hammer or hammer-less. There is no more efficient way to twist an underlug than to take an unexpected tumble with an open gun. When & if this should occur you may well land across the "Middle"of the gun. Tremendous force an be applied to the Hinge area in this case. The gun is much less apt to receive major damage if Closed & Bolted.
I have only taken one major fall while hunting. My gun was loaded, closed & bolted. It did not jar off, possibly because of the overhead sears. It received some minor nicks & scratcehs but no major damage, could well have been far different had it been open, I did fall right across its hinge area.
Take this for what its worth to you, it didn't cost you anything, but look at your gun open & think about what I have said, I seriously believe if you do you can well visualize what I am saying.
