Gunsmithing Old style pinned Remington extractors

[Easy_E]

Hello I rebarrel an older Remington 700 and it fed ammo / shot great . After Cerakoting the barreled action the extractor is tearing up the rim on the brass when chambering ? I didn't blast the bolt face directly and didn't see media under the extractor did the baking process warp it ?
I've cerakoted a few newer style 700's and never had this issue .

 

[FCrifles]

My guess is you got some blasting media in there behind the extractor. Take a punch or something you can push on the extractor with, and see if it's working correctly. If it seems tight or you hear grit, you can put a couple drops of kroil on the B/F and let it soak in. Then work on it some more to see if it loosened up.

Mask off your B/F in the future to save headache. NIC makes a nice little plug kit that will help out there. Plug the firing pin hole, plunger hole and then heat tape the bolt nose (which will cover the B/F) trim with a razor. Takes all of 2-3 minutes and will save you some headache with extractors that you want to leave in.

 

[Easy_E]

Thank you for the reply I ordered some new extractors today just in case . On new bolts I tape off the bolt lugs forward but this one had some wear to refinish.
I like the plug idea that works better than tape off to NIC !

 

[Easy_E]

Went out to the shop to try your suggestion and nothing was really behind the extractor but the Kroil ran down the ejector hole . Pushing on that pumped a bunch of crap out so I pulled the plunger and spring . Going up in number drill bit sizes twisting by hand got all the carbon/media out.
This solved the problem with dummy rounds will have to try it on the bench tomorrow .

 

[FCrifles]

I assumed your plunger was functioning properly. Glad you got it figured out.

Always verify that your plunger is compressing just past flush with your B/F. If not, time to pull it and clean the hole and spring. I always check the extractor and plunger before dis-assembly on a rifle before teardown/prep. This lets me know if there is a problem before. Otherwise you will be questioning yourself after the fact if you caused it.

 

[Easy_E]

Just finished up shooting it worked perfect sticky plunger was the issue. I just assumed soaking and gassing the bolt would dissolve any build up in the plunger hole but was wrong . Taking your excellent idea cleaning and checking function before coating.
Thanks Again