Originally Posted by
eyebull
As soon as these are available in .177 and .22 I will be happy to try them.
My concern is that if they need more air to push them, then running them at a reasonable power would leave the gun overpowered with diabolo pellets.
You should note that airgun barrel twist rates are in general not well matched for shooting bullets. In .22 and .25 with 16-18" twist rates medium length or short bullets work, in .177 they do not stabilize. As an example my .224 has 12.7" twist barrel and my .257 uses 14" twist. However, if you want small caliber stuff people have been building .172 bullet shooting airguns using powder burner barrels with good success. It might actually be rather interesting to see a 12 fpe .172 shooting this bullet:
Viking Mk2 .177/.22 bullpup, BSA Scorpion SE .177, BSA Scorpion .25 100M gun, BSA Scorpion .224 100fpe 100M gun,
Evanix Blizzard .257/.357 200M BR, Evanix Sniper X2 .45 at 270 fpe