Bronko,

If you do any shooting on humid days, give fffg a try as a priming powder. Because the black powder is somewhat hygroscopic, it tends to pull moisture from the air in humid conditions. The larger granules of the fffg retain more space for oxygen and compact less and it seemed to work better in my personal experiences shooting on humid days. I didn't notice any difference in the ignition time, even though I know that ffffg has a faster burn rate (although very minute) when measured electronically. The fffg powder used as a prime worked very well with the RMC liners I use.

BPS