edit: oops! thread is a month old! my bad...
If it was from a loader you trust - complain loudly. and return the rounds to them so they can see the **** up.
Otherwise...
Break'em down. If one thing is wrong, who knows what else is wrong.
Dump the powder on your rose bushes. You don't know what the powder is so don't trust it!
Save the bullets and brass for another day.
When you do load them again, load them on the lighter side just in case the primers are magnum primers. If you're overly cautious about the primers being magnum and messing with your future loads, carefully load them in your magazine one at a time and discharge empty casing (just brass + primer) at the range. If you live in isolation, doing so in your garage is prolly also safe with some ventilation. Maintain proper gun safey for line of site, backstop, etc. I dunno if it's considered discharging a firearm (no projectile) - but be aware of city firearm discharge laws, etc.
I *have* oh so very carefully managed to deprime a live primer from a case in a single stage press. Make sure your bench is completely clear, ear and eye protection, and extremely slowly size & deprime motion. If you're brave. My thoughts -- 40 primers is... $1.20 ? $1.50 ? Just discharge the blank casings and not try to save the money in supplies. Fingers, eyes, and your tools in working order is more important than less than $2 in supplies.