Sure, go ahead IF you want to make your rifle/handgun into a smooth bore! Sand can never be completely removed from inside the case. During firing, it could/would be dragged down the barrel by expanding gasses, then run over by the next bullet.
As said above, it WILL scratch the heck oiut of your dies as well.
Media used for case cleaning HAS to be soft enough to not hurt dies or barrels.
The more people I meet, the more I love my dog
They're going to get their butts kicked over there this election. How come people can't spell and use words correctly?