are they tempeture insensitive like the Hogdon Extremes?

Never seen anything posted about it, just curious.

thanks

I read that RL 15 is less temp sensitive than some other powders and thus similar to Hodgdon extremes. This is the only RL powder that is less temperature sensitive. I have seen no independent testing that any powder is less temperature senesitive than another.

I also read from the same source, John Barnsness (MuleDeer), that an additive is in RL 15 that reduces copper fouling. The only other powders that are supposed to have this copper fouling reducing additive are Ramshot powders.

Buried somewhere in a mess of papers, I have a test Hodgdon did on thie powders at various external temps. They named the powders. RL series was one of them. While there were some extreme spreads in velocity due to temperature change, the RL series had a very small spread, is one test, I believe of RL-22, the velocity spread wasn't much more than the Hodgdon Extreme it was tested against.

for most applications it isn't anything to worry about.

I have found the Reloader series of powders to be extremely insensitive to temperature variations. I don't know why, but in my experience, they give better velocity and pressure characteristics, and greater shot-to-shot consistency with good loads. I've noticed this particularly in comparison to single base powders.

RogerK:

Would be interested in reading the results on RL22 if you should find them and don't mind posting. Thanks.

Regards,
hm