Tipoc,
Since you specifically asked, I refer you to the February 2018 issue of The American Rifleman. On page 65 is a test of the Kahr CE 9mm at 15 yards and on page 76 is a test of the RUGER Security 9mm at 25 yards.
The RUGER article written by B. Gil Horman, field editor, but the Kahr article is not authored but rather inferring to NRA staffhouse.
Looks like NRA has forgotten their own 100 year old standard maybe?
You are right about the test of the Kahr and about the test of the Ruger. So why? The answer is clear by looking at the guns as described in the articles.
BTW, I was wrong to say "rarer than hen's teeth".
The Kahr is a sub-compact, 7 round mag, da piece meant for concealed carry. It's around the size of a S&W Shield. It's built to less exacting tolerances and standards than Kahr's previous guns.They test it for accuracy off rests at 15 yards. They describe this gun as useful for CCW. They test it like they test snubbys. Though in this case it did well at 15 yards and maybe would have done better than the Ruger did at 25.
The Ruger is a compact piece meant to fill the same niche as a Glock 19. It has a 15 round capacity in the mag. The barrel is .200" longer than the Kahr and the gun is a 1/2" taller. They test this gun at 25 yards. They describe it as useful for home defense, daily carry, range use, or a camp or trunk gun. They test it like they test most other pieces that they feel qualify for use at 25 yards.
They test the Ruger carbine at 50 yards, BTW.
They usually tell you why they test a gun with their standard 5 shots at five targets at 25 yards, or less when they feel that shorter distances are what they gun is designed for. In this case they feel that for the Kahr.
American Rifleman and Handloader both have the same standards of testing. The distances and method are as official as long standing custom can make a thing.