Kcofohio, actually it was a metal cap on a plastic canister, the original factory cap and container. And after inspecting the lid and the canister, I'm almost 100% certain it wasn't due to me over tightening it, I don't do that, tight is tight and doesn't need to be put on with 50 lbs. of torque.
It was a first for me too RC. I think the reloading gods are angry with me or something, cause I've had more incidents happen over the last couple weeks, than in the 30+ years of reloading combined.
Ya, I know it's not a financial disaster, I'm really more irritated that it even happened, than I am with the little bit of powder lost. Like I said, something is wrong with the threads on that one container. When I screwed it back on, it just kept popping off, so I had to transfer the powder to one of my empty one's, then I just printed a new label for it.
SwaneeSR, my Son did the same thing with his Chargemaster weekend before last. It was a pretty big spill, but fortunately almost all of it was on his clean bench top. He was loading .40 cal with Longshot. I think the reason why reloading gods are angry with me, is because he had poured an entire pound into the Chargemaster, and didn't notice the powder running out of the spigot until almost the entire pound had drained out. But it was funny though.
TexasDon, I've done the same thing when loading on my 600 Jr., more times than I like to recall. And the worst part is, it hasn't always been just powder either, I've dumped hopper's of shot every where. I'll take sweeping powder up any day over 7.5 shot.
GS