Crimping sticks badly when using stainless steel cleaned brass

[nikman]

Need your advice. When I'm reloading using Dillon 550B, the crimping stage sticks badly and I would need both hands to pull up the handle. This only happens when I'm using brass cleaned using the stainless steel tumbler. When I switch to brass cleaned using corn cob, all four stages are operating smoothly. There are also flakes of brass residues on the crimping die.

Are my s/s cleaned brass "too clean"? Thanks.

 

[ryan]

Need your advice. When I'm reloading using Dillon 550B, the crimping stage sticks badly and I would need both hands to pull up the handle. This only happens when I'm using brass cleaned using the stainless steel tumbler. When I switch to brass cleaned using corn cob, all four stages are operating smoothly. There are also flakes of brass residues on the crimping die.

Are my s/s cleaned brass "too clean"? Thanks.

My guess would be peening of the case mouth. Stainless will do that. Try lightly deburring and chamfering, should be ok. Next time you tumble brass, fill the tumbler almost full of water, it reduces that effect.

 

[zuke]

Yep, I'd say VERY clean brass. Call dillon and ask them,their suppose to know