C'mon man. BS can get old for sure. Just bob and weave.
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I appreciate all the responses and advice in this thread and the ones prior so far. I've learned a lot from here and from the articles linked. I'll still be around. Thanks everyone. I'm just gonna shoot the crap out of this thing and enjoy it.
Shooter's Choice Polymer Safe Quick Scrub Firearms Action Cleaner will easily make your chamber look like new. It is sold in an inexpensive 12.5 oz aerosol can and works as advertised.
There is a chronicle of Filthy 14, the BCM rifle used by Pat Roger's EAG Tactical. This is an extreme example, yet insightful. This chronicle can be viewed on the Slip 2000 website https://www.slip2000.com/blog/s-w-a-...ine-filthy-14/
The amount of crud that rifle went through is as much a testament to BCM as well as an AR running a mid-length gas with a button-rifled chrome lined barrel. Granted it is a sample of one and may be a singular unique outlier but still...
I have to agree with the general notion OP, keep posting with progress on shooting the snot out of your 6920. Don't sweat the little things and take ample notes of the performance over the lifespan, parts wear, and even ammunition type and manufacture at listed temps and conditions (god love smartphones with built in weather apps).
I think the whole problem with Filthy 14 is that folks miss the point of the exercise and go overboard on rounds between maintenance other than douching the rifle with lube.
I tend to keep my rifles 'two hundred rounds clean' to avoid getting firing residue on me.
I shoot all suppressed. The blow back creates some gd awful carbon build ups. I clean my M4 completely EVERY time, as well as all my other suppressed guns. The .22 is tough. One visit to the range and my little ruger/sparrow combo gets blasted with carbon and lead.
Use a dremel followed by a super fine grit to clean suppressors (not the .40 glock/osprey, or the DD M4/socom silencerco) the osprey and socom don't get dirty or cleaned. The copper cladding and muzzle blast (m4) keep them clean. The guns attached to the suppressors get trashed with carbon build up. I clean everything. A small metal implement is ideal for the area you speak of. The base metals are much stronger than 36ksi steel. I believe they run 60ksi yield strength in the chamber. You won't skratch those parts.
You are NOT ocd. Don't listen to these haters, they trash everyone who isn't them. Dont waste your time letting them dictate your enjoyment of the sport.
I also have a couple cabot pistols. They are very expensive and have incredible tolerances. A little carbon and they get less dependable. If you saw my cabots, youd see clean. Especially my Trump .45.
Put a pan on the floor to catch fluids Go to Wal-Mart and buy their brand of carburetor cleaner. Aim the muzzle at said pan. Spray liberally into the chamber. Re-lube the rifle. Save the caught fluid for future parts cleaning. Go shooting.
You also generally want non-chlorinated brake cleaner.