In 50+ years of loading, I have never had contamination of the powder in the hopper. Not a risk.
The HUGE risks are dumping the hopper into the wrong can - and that WILL contaminate the powder. If you dump ball pistol powder into a can of ball rifle powder (they look the same) that will blow up a rifle.
The other risk is looking at the hopper and thinking the powder is 4350 and it is actually 3031. That will blow up a rifle, too.
When I put powder in the hopper, I stick a piece of masking tape on it, noting the powder.
And when done, I dump it back into the right can.
If you leave the powder in the hopper it can damage the plastic and the powder will dry out (speed up).
The HUGE risks are dumping the hopper into the wrong can - and that WILL contaminate the powder. If you dump ball pistol powder into a can of ball rifle powder (they look the same) that will blow up a rifle.
The other risk is looking at the hopper and thinking the powder is 4350 and it is actually 3031. That will blow up a rifle, too.
When I put powder in the hopper, I stick a piece of masking tape on it, noting the powder.
And when done, I dump it back into the right can.
If you leave the powder in the hopper it can damage the plastic and the powder will dry out (speed up).



















































