White powdery stuff where barrel meets action

[sierrastalker]

Anyone ever had this? There's some white powdery residue built up inside my 7mm-08 Sako A7. The rifle has been in a climate controlled gun storage room for a bunch of years and never fired until recently. I've only got 30 rounds through it for barrel break in. Was shooting some pretty mild loads with IMR 3031. Not sure if that means anything. It's flaky/powdery with a kind of tough lump in it. I'm hoping it's some kind of grease coming out and not corrosion of some sort.

Other than cleaning it and oiling, any other advice or idea of what it is?

 

[H82MISS]

I may be wrong- but only time I've seen this was when after bluing process done- the parts were not rinsed correctly and some remnants of bluing salts remained. Other than that- hopefully someone here thats a gunsmith can explain.

 

[BigDon]

Show this picture to Hunter B. and ask him. He'll know.....

 

[sierrastalker]

I just got in there and picked it out with a dental pick. It was pretty hard and crusty. Looks like there's a pretty even ring of it around the barrel. I'm thinking it was some kind of lube that squished out and then the rifle sat for 10 years and it just got crusty?

When I scraped it off the bluing was intact and there was no rust underneath.

 

[RockyMtnMT]

Looks like Loctite.