First of a series of six monographs:

https://www.pyramydair.com/blo...e-as-pellets-part-1/

Are CB caps as good and accurate as pellets? Part 1
by Tom Gaylord (B.B. Pelletier) August 12, 2011


"Today, we’ll start a large report that I’ve wanted to do for quite some time. It’s based on the belief in the firearms community that a .22 caliber CB cap is just as good as an air rifle for eliminating pests.

By “good” I take four things into consideration: accuracy, power, cost-effectiveness and discharge sound.

Before I started this test, I’d read a lot of shooting forums and came away with the observation that very few shooters really know what CB caps are and how well they do or don’t work. Every discussion I found was centered on using the cheapest approach to pest elimination, then projecting the CB cap on it as the solution. I also discovered that the people who were doing the talking considered Gamo spring rifles to be the most expensive air rifles around. They also were comparing CB caps to Crosman 1377 pistols and 1077 rifles.

With that much confusion and misinformation, I felt honor-bound to test CB caps against real, worthy air rifles — not to shame the CB caps, but to set the record straight. In this test, I’ll be pitting several .22 rimfire rifles shooting CB caps against an AirForce Talon SS with a .22-caliber, 24-inch barrel. It’s the same rifle I tested for you several weeks ago in the three-part series titles What would BB do? In fact, that report series was actually one of the preambles to this test.

Brief history of the CB cap
The CB cap has a history that dates all the way back to the 1840s. At that time, the percussion cap was relatively new, having been in existence less than 40 years and in general use less than 20 years. By 1840, it’s safe to say that percussion ignition had all but replaced the flintlock except for a few shooters who held out for very specific reasons."


...

and a URL to them all:
https://www.pyramydair.com/blog/?s=cb+caps&submit=

I kill rats in the dark at 50 yards using my thermal NV with them.

They work just fine.