Is this Cosmo, and Why?

[Amsdorf]

Picked up my "new" CMP Collector Grade, Springfield yesterday. The thing is beautiful! It was manufactured at SA in 1956. Looks like it has never been used. Question for the resident experts. It looks like it still has cosmoline in the receiver, but only at the gun's lube points, that is, where one would ordinarily lube it up with grease. Do you think this is cosmoline? And if it is, why only at these points in the receiver? There is no cosmo anywhere else on the rifle, only at these points in the receiver. Here are pics of what I'm talking about:

Information

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[Rick Cummelin]

Looks like good ol' USGI rifle grease to me. Same dark brown stuff that comes in the little plastic bottles that fit in the buttstock, or also in one-pound cans (common surplus item at one time).

Late production rifles were NOT shipped/packed in cosmoline. They were "dusted" with a dessicant-type powder and stuffed in plastic bags. When removed from the bags, they are VERY dry, especially the wood. So there's no reason for your rifle to have ever had any cosmoline on it.

[John Wyatt]

Many of these rifles were returned full of heavy preservative grease from the Greeks, but that just like like a previous owner lubed his rifle

[Amsdorf]

Thanks, I've determined it is definitely just grease, lube from previous owner.