Can my 700 rem 223 bolt be rebuilt?does not eject some rounds..?
Have it looked at by a good gunsmith.
It needs checked out for sure. Failure to eject some rounds could be a problem with the ammunition. But it could also be a "head space" problem. There are lesser problems- that head space problem is a "major" concern from my point of view. Not knowing just how far you have stripped it down for cleaning- it might just be that you have not taken good care of it and some parts need cleaned and oiled.
C T M
Yes, all you need is to call your local gunsmiths and set an appointment to drop it off, it doesn't need "rebuilt" it needs repaired, most likely you have a bad spring in either the ejector or extractor and possibly both.
You can 'rebuild' the bolt, but the first thing I'd do is scrub it completely. Sounds like crap and crud may be forcing the extractor to fail to grab the spent case.
Sounds like the ejector is worn out, any gun smith can replace that for you. The gun does not need a rebuild just a single new part most likely.
There seems to always be a communication problem when someone explains a mechanical failure. Maybe someday YA will have something like a master explaining machine. Rebuilt, overhaul, refurbish, parts replacers, and etc., etc. can be interpreted several ways so no honest gunsmith/mechanic can see what a Remington 700 is doing nor examine all the possible problem areas on YA. My best way of trying to diagnose problems over the phone or email/texting is to exercise the little word "if". EXAMPLE: (If) your bolt locks in really tight you may be pushing a tapered case in too much and after firing it the case is even tighter...so tight the rear cam that the bolt handle on open position doesn`t help much (if) the bolt handle has too much gap. To fix this problem can open up a can of worms and only a *Master Gunsmith* can fix this problem (if) you reuse the same bolt. Bringing the old bolt and action back to new specs is "rebuilt" in my definition, not replacing a part. *Master Gunsmith* IMHO is a highly skilled person with lots of experience, (NOT a firearms historian that knows all the "gun" data back to WW1 nor a person that owns 300 firearms, reloads, and shoots hundreds of rounds a day) this person (MG) is well equipped, has machines such as TIG welder, bead blasting cabinet, lathe/milling machine, hand grinder(Dremel), lots of files, microscope with assorted Barlow lens to do intricate work under magnification or "cheaters"(optical visors), holding devices, and special tools and can use all of them. In other words... only occasionally has to leave his/her workplace to repair most any firearm. There`s little chance a person that works on guns in a shed behind garage with hand tools can fix all the problems that guns have, however, replacing parts could cure your problem. Take your Remington 700 to a well known, honest gunsmith and get advice. You may be better off $-wise to get out from under the rifle and buy new.
if you can't tear it down completely yourself then send it to a gunsmith. it could be a simple as needs good cleaning & lube.
Homer Bufflekill: Let me ask you this
Let me ask you this: Are you shooting 223 or 5.56 ammo? You can safely shoot 223 in your 5.56, but not the other way. There are higher pressures in the 5.56 and may be swelling your casings to the point the extractor cant 'grab" them. What do you do, knock it out with a cleaning rod? Is it hard to open the bolt? Any marks on the casings? Did this just start after you switched ammo? Those 700's are tough, I cant believe its the bolt.
Rebuilt? Things that cause 'failure to eject' * Dirty chamber. Clean it with a 223 wire brush until you can run a patch through and its clean. *Cheap or bad ammo. Most cheap 223 ammo is designed for loose AR-15 chambers. Try boxes of name brand like Remington or Winchester. *Ejection is a function of the bolt. If the spent brass is stuck inside the chamber, look to cleaning first. If cleaning does not work for you - then look at the ejector on the bolt.... make sure it is clean and there is no gunk preventing it from moving and latching onto the round. You need to be more specific when asking a question here. Not ejecting some rounds? You could have said the rounds are not coming out of the chamber. You could have said the ejector was not pulling them out, and, you could have told us what you were doing to get them out eventually? If that ejector is pulling off piece of brass from the cartridge base - its not an ejector fault - its something causing the cartridge to get stuck. Good Luck