A quick question.... I recently bought a 303 rifle. The barrel is super clean; cleaner than I've ever been able to get any barrel ever! I asked the previous owner how he cleaned it and he said he used a pull through with a wire brush and sprayed a heap of CRC 556 into it. Then use a cloth swab soaked with 3 in 1 oil through it. Will the CRC have any detrimental effect? It's sure done a helluva job at keeping it clean. I do use the CRC Long Life on the outside of the steelwork on all my rifles. Thanks!
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