I shoot mono’s in my two hunting rifles .243 and .270 . In my .243 I notice copper fouling and accuracy issues after 30-40 shots. My .270 isn’t as affected by copper fouling. I don’t shoot much through those two rifles but clean them after every season oil and store them away. My 22-250 sees light jacketed bullets I can’t actually remember the last time I cleaned it but still shoots great. Guess I’ll pull it out tonight with all the time on my hands now and give it a service.
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