That other Model 60

[desi2358]

That FThroat problem was finally fixed when the Ejector was changed from a cast protrusion of the LH piece of the FT.
The new style was to use a longer carrier torsion spring. The short end that was being hooked and held into position on one of the sideplates of the action assembly was lengthened.
That extra length was brough up and bent so as to lay in a groove in the FT where the cast ejector had been.
The end of the spring wire was now the ejector, never to wear out.
Better quality FeedThroats from another bendor helped some wear-out issues with feeding as the plating on them had been poor.
The newer FT's work well.

The idea for them came from a gunsmith in the Service dept. a longtime employee. (pre-ww2).
He made a conversion and the parts, gave the rifle to the Range and had them fire it till it jammed. It didn't. This was in 1972
He submitted the idea into the factorys employees idea for cash thing.
His got refused,
The management told him that R&D had already thought of the same idea and was in the process of making up a rifle to test,,,so thanks anyway Larry. Go back to your bench.
.

Some great info in your post, always wondered about the feed throat design and materials. I used to buy the improved parts (Numrich sold them as a set) and replace them as a matter of course in guns brought in for jamming issues unless there was some other obvious cause. Somehow, I'm not surprised at the factory not crediting the guy who thought up the improvement on his own. Seems to fit all too well into corporate America in the late 20'th century. Even if R&D had gotten a similar idea he deserved some credit.