Anybody use dry additives to their vibratory tumblers' corn cob media?

[palmettomoon]

I am about to take delivery on a large quantity of brass that will need a little tumbling before I sell it. I cannot wet tumble this brass as it is primed and ready to load, just a little tarnished from age and storage.

I'm thinking of trying aluminum oxide as an additive, similar to how a rock tumbler might. Would you use a different additive? 80 grit or finer? I don't want to have multiple steps in processing this brass so one tumble and bag by count for sale is my objective.

Thanks in advance.

 

[palmettomoon]

I read that it's too sharp so I'll stick with Nu Finish car polish as an additive.

 

[BHPSteel]

 

[Red Rex]

Maybe mix crushed walnut shell in?

 

[Apollo]

I wonder if corn media or anything smaller that can pass through the flash hole effect the primer going off? I've never tumbled primed brass but I always get media stuck in the flash holes.

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[CAMSDADDY]

I use rice. I have found its cheap and leaves a decent shine

 

[robchavous]

Flitz tumbler media additive

 

[palmettomoon]

I wonder if corn media or anything smaller that can pass through the flash hole effect the primer going off? I've never tumbled primed brass but I always get media stuck in the flash holes.

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I've run tests. It has no effect on reliability that I found. MV increases slightly (about 20fps) for obstructed flash holes vs. not.

 

[thevalueman]

I wonder if corn media or anything smaller that can pass through the flash hole effect the primer going off? I've never tumbled primed brass but I always get media stuck in the flash holes.

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my thoughts exactly....my media always gets stuck in the flash hole...

 

[Jackie Graham]

I use 20-40 corn cobb media. It is about as small of a grit that I have found. I have very few that actually stick in the flash holes. Also add turtle wax car polish. Nu-finish would probably work.