I hope you guys are calling these cartridges flops because of sales figures, not because of their performance. For instance a .357 Max is great out of a contender. It rivals a 35 Remington(I know, another one). Lots of the unpopular ones made it into the contender lineup. I never did see the hoopla in the super short magnums, did they outperform the old ones? The 22 Jet, yup, didn't really work out, great concept though, a hot 22 centerfire out of a 6inch revolver. Wow! I wanted one bad. Same thing with the .219 Zipper, basically a 22/250 out of a Winchester 94. How about the Accelerator line of sabot'ed ammo? The .327 Federal looks like a hot rod, why not? Way back in the early 1900's, there was a lot of cartridges that came out that were improvements over the popular cartridges of the day, there has been very little actual improvement since then in my opinion. We could get the job done with only a few in most hunting situations. Almost everything was based on the .44/40, .30/30, .308 or the .30/06. The 222 Remington brought us a new case size, thank you very much for that. Then came the .264 Winchester Magnum, 7mm Remington Magnum and the .300 Winchester Magnums. These were off of the H&H cases of the late 1800's! Then the 6mm BR, with the small primer pocket and the small flashhole, hmm, lots of benchrest guys seem to like em.