Hey Dan, good to see you over here. I have shot a bunch of 44 and 357 loads with tumble lube, mostly mid to light loads with no problem. I have stored them for long periods and found them to store better upside down, where the powder stays in the case base than down on the bullet base. Over time the powder seems to soak up some of the lube. I have had several misfires in 6-8+ year old lots.