You may find your best answer here:
This is a discussion on Colt cobra question? within the Defensive Carry Guns forums, part of the Defensive Carry Discussions category; Whats the service life of a colt cobra's frame? I ask as I have a '72 cobra that I've owned for a few years now ...
Whats the service life of a colt cobra's frame? I ask as I have a '72 cobra that I've owned for a few years now and besides a cylinder full of +p ammo I've only ever shot standard pressure .38 ammo,and not much at that. This being said how do I inspect the frame for damage,what do I look for?
What are signs of a stretched frame? I've also read a way to tell if a previous owner has fired a lot of +p ammo through one of these guns is to look for whats been described as "ratchet marks" inside the frame. What exactly causes these and what do these marks look like? I ask as I just though it prudent to inspect my cobra. In the end if one only fires standard pressure ammo in one these guns is it likely any of these problems will ever occur?
If the public are bound to yield obedience to laws to which they cannot give their approbation, they are slaves to those who make such laws and enforce them.--Samuel Adams as Candidus, Boston Gazette 20 Jan. 1772
NRA Benefactor Life
Tennessee Firearms Association Life
When you’re wounded and left on Afghanistan’s plains,
And the women come out to cut up what remains,
Just roll to your rifle and blow out your brains,
And go to your God like a soldier.