I wouldn't hesitate to recommend tumbling primed brass if you really think it needs it. The fleck of walnut or cob that might get stuck in the flash hole won't cause any trouble at all. When I tumble unprimed brass I blow those flecks out with 50psi compressed air and a primer has much more power than that.
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Proud member of the NRA and Texas State Rifle Association. Registered and active voter.
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