Pellets are not as efficient in either cartridge guns or front stuffer's. I believe the pelletized powders are more of a convenience and offer a slightly higher level of consistency over metering charges of powder through a primitive handheld powder measure in the field. However, I believe that simple logic dictates that a powder compressed into a solid will never have the reliability or rapid ignition of a powder. Inlines using shotshell 209 primers may ignite pellets consistently, but again, ignition and burn rate will be slower than using a powder. Reachingn the peak of the pressure curve quickly is important, especially when using black powder.