racknrider
Copper BB
I recently purchased a 930 JM and would like to relate my experiences. The first day I got the gun I took it to the range and shot it straight out of the box. It ran all slugs, buckshot, and birdshot (100 pack winchester) with no problems. Woohoo! Took it home for a thorough cleaning and lube. Next day, FTEs and stovepipes, so I go online. I clean the gas piston and lube it very lightly. Back to the range I go. Feeds and ejects fine but 4 light primer strikes. I take it back home, disassemble and clean the gas piston, again lube lightly. I then remove as much oil as I can from the bolt and slide and blow everything out with the compressor. Back to the range and it runs like a sewing machine, feeds, extracts and fires everything I feed it. I lube with Breakfree CLP. Anyway, this is the 1st time I've had a gun that actually seems to be lube sensitive. Just my observations.