I have both the .19 Calhoon, and the .19-223 in CZ rifles. In regards to accuracy, they'll both shot under 1/2" consistently! Generally, it is one ragged hole. With the .19-223 that is with a 32g bullet at over 4000 fps! And I would'nt consider the .19 Calhoon anemic, cranking out 3600 fps with a 27g bullet! -And only using only 14.7gs of powder to boot.
On a bet at the 100 yard range, I hit back to back M&M's with my .19 Calhoon. The fellow who made the bet thought it was a fluke when the first M&M exploded. I told him "double or nothing?" He jumped on it hoping to regain his $20. Well, when the second one exploded his jaw just dropped. - The point here is, that I had total confidence in the cartridges inherent accuracy to take a bet like that. I told him "it's lucky he run out of M&M's." Otherwise, I'd of probably won enough to buy another Calhoon. LOL!
Just based on my past experiences with my Calhoon's I'll be purchasing a .19 Badger sometime soon. Not that it is going to fill any void the previous cartridges could not. Just because I know it will be a shooter, and I enjoy the caliber. You will not be disappointed no matter what Calhoon you purchase.