Yeah, Rog - they burn real filthy - lots of unburned powder residue in the barrel and around the bolt/barrel interface - a sure sign of a too-fast-burning powder trying to propel a substantial load. We've had a number of "Go-To-Hell" shoots (no classes, no gauge or load restrictions, no prohibitions on shot loads other than #7 shot is the max allowed on our IWLA range), where some of the more robust ejection systems on the autos as well as some O/Us have actually ripped the tinfoil head off these sub-El Cheapo loads. Not a pretty sight and the aftermath sometimes requires tools and an even temper.
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