NO WAY
Do not attempt anything like that. Do NOT even attempt to reuse the brass after firing the blanks.
Blank powder, in order to make noise and do nothing else, is extremely fast burning and CANNOT be used safely for any other purpose. Especially NOT moving solid projectiles down a barrel. Doing so would likely cause rapid dis-assembly of your firearm, and trigger hand, into more pieces than they were made with. There is also danger to your eyesight, hearing and those around you.
Blanks, even in their intended state and use, are as dangerous as live ammunition and people have been killed misusing them.
My advice is find a bucket, fill it with water, and store your blanks in it.