Butlers Rangers, I agree that it has 2 very strong safety lugs, but you would never know it when you read any description of Krags in reloading manuals. Every one I have read seemed to imply you needed to worry because of the single lug.
On my sporter the forward lug is worn and set back enough from many rounds being fired that it actually bears on both the forward lug and the guide rib. I can not prove it but I have a feeling this has happened on a fairly large percentage of the US Krags out there.
So if your locking lug has no visible crack, your headspace is with in reasonable limits do not worry, be happy.

Just a reminder it has been discussed on this forum that some reloading manuals have had loads that are unreasonably heavy. A new shooter of Krags has to be aware of what safe loads are and avoid the bad recommendations.