Be careful with Promo powder and Fiocchi primers in colder weather. I've loaded over 50lbs of Promo and only had trouble with Fiocchi primers. Every now and then I would get a weak sounding load. Switched to Cheddite and Federal primers and the problem went away.... Just my experience.... Dan Thome (Trap2)
I paid $85 for 8# kegs last Dec. Just for fun, I used my scale and measured out 25 18gr charges of promo to try. 1 1/8oz and fig 8 wad, worked great! Very happy. I am finishing up my last keg of clay dot before I make the change.
I have shot several kegs of promo. As a matter of fact it took help me be a AA shooter. The only thing I hate about it is it is way dirty. Your action and barrel will be black. I never really paid much attention to it until I switched to clays.
18.7 gr Promo, FIO primer, green duster wad and 1oz of #8. -6°F a couple weeks ago in Wallowa and everything worked just fine. Keeping the pressures up on the Promo powder encourages cleaner burning....... Larry