Stoning the ejector:
1. Get a SPARE STOCK ejector.
2. Try stoning the bottom "flat" of its front, so the "corner" point moves upward towards the 3:00 position of the bolt as viewed from behind. That *might* make the brass jump a bit more upward as it peels out from under the extractor.
Then again, I just might have this backwards.
There may also be a slight stoning to be done on the 4:00 area of the extractor, but I've forgotten so much, I've earned Senior Moments before my time.
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On removing the brass marks:
Gee whiz, dontchaknow that Phospate parkerizing finish has limited abrasion resistance?
Just rub the stuff off with a cleaning patch and any old copper solvent. It WORKS, and with less abrasive action than even a patch and Break Free (better solvent = less rubbing).
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I've seen tuned M-1s and M-1As that toss their brass in a nice little plate-sized pile about 2 feet from the action, at about 2 0'clock from the line of fire.
If you're really into TEOTWAWKI, leave the op-rod ejection assist intact. The larger disbursal area and having them tossed farther away from your position make it less likely after any five-plus round exchange for you to experience:
1. Tripping on a pile of rolling brass as you jump up and run to a new firing position, or
2. Having your position easily marked by aerial spotters who see a nice pile of shiny brass not so far from your head, or
3. Ditto for #2 on anyone with night vision picking up a larger infrared signature from a compact brass pile,
4. Being quite easily tracked from your LAST firing position by incompetent trackers who would miss a more spread-out brass pile.
And if you take any of these four points seriously, you're thinking WAY TOO HARD about extreme situations!