If I dry tumble, do I need to rinse my brass afterwards?

So a day or two ago I received a text from a family memeber that said the following.

"Talking with John Doe. He mentioned if you tumbled brass with dry media you must rinse the brass because of the microscopic residue from the dry media that collects at bottom of the case and in the primer pocket. He uses a liquid to bypass this problem now. He asked me to mention this to you. It increases the temp. & flash. Larry's (John Doe's son) gun blew up when he neglected to do this in the past."

I have never heard of this before. I thought the worst that could happen is a really dirty primer pocket could lead to a primer not seating properly. I've never heard of media dust grenading a gun before, or that it can cause a increase in "temperature & flash".

My relation knows nothing about reloading at all, and I have never heard of this. That doesn't make it untrue though, so I thought I better ask since I'm new to it also.

The individual who said this is rather prideful about his firearms knowledge. If he double charged a round, I don't know that he would own up to it. Id sooner expect an excuse to be generated.

Any truth to this?

That's what I thought. Any firearms respect I had for that dude just went out the window.

RPRNY said:

Please encourage this Larry John Doe fellow to join THR. I think his input to the forum would be invaluable.

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In my experience, he would have no reason to join. He already knows everything, and would have no questions. There is a reason I do not talk guns with him much.

Walkalong said:

Baloney, something else did it. Something major, like a double charge.

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That's what I assumed as well. I'm pretty sure the Glock that was blown up was being shot with this gentleman's reloads as well. I think he is just making us some kind of excuse to cover the fact that he screwed up, ruined his kid's gun, and his kid's hand got a little banged up as well.

Well, note to self: Never take advice from that guy on reloading. Walkalong, you guys have already confirmed what I believed. My question is answered. You can shut this one down if you want, unless you feel there is any benefit to leaving it open.