Rifle won't chamber round

Confession. Actually had an o ring come off cleaning rod guide and stay in chamber. Needless to say couldn't chamber a round. Looked with light and saw it when back at bench. Now check cleaning guide to make sure has all o rings when removed. Just a stupid mistake.
Thanks for posting this, I could see this happening for sure.
 
I can't see anything on any of my old brass, or inside the gun. Gave the rifle a good cleaning today and still no luck. Forced a piece of brass in and these are the marks it leaves, almost flat. Guessing I will have to find a local smith to bring it in
It almost seems like something that leaves that big of a dent could be seen with the naked eye and a flashlight.
 
boy, I'm very curious to see where this one goes... I had a chamber that was scratching the heck out of the shoulder on cases. Had it polished to no affect. Took it out and shot it for sight-in for a hunt and the scratching went away...??? Not intending to hijack, no replies necessary, just tapping in.
 
Can't wait to see what is causing a dent that big in the brass. Especially since nothing has been changed on rifle since last firing.
Shep
 
Only thing I can think of that would put a dent that big in the top of the brass would be a buldge in the chamber from a base screw. If the base hole was drilled into the shank and a long screw were used maybe it could push a dent into the chamber. Very slim this is the problem. Especially given that the op stated he hasn't changed anything. If a brass separation occurred I think he would of seen a broken brass as it came out and it would have had to happen on his last shot or the problem would have occurred during his previous session.
Shep
 
I will get a bore scope ordered. It is factory ammo and was fired from the same rifle, I only tried the brass so it would be safer to force it some than a live round. I do not have a go gauge either. Just to rule it out I removed the scope mount and stock but same issue. I have every piece of brass fired since I have owned it, wouldn't I notice looking at the brass if one separated?
 
Only thing I can think of that would put a dent that big in the top of the brass would be a buldge in the chamber from a base screw. If the base hole was drilled into the shank and a long screw were used maybe it could push a dent into the chamber. Very slim this is the problem. Especially given that the op stated he hasn't changed anything.

Depending on the quality of the hardware, the screw could have broken mid shaft and worked its way down under recoil. It wouldn't have to be sticking out far to make that kind of a dent when the pressure of the bolt was applied. It could be loose enough to have been held in place by the bolt after being put away last range session, bolt is opened now and it drops down just a little further.

My guess is that it would be noticeable trying to close the bolt on an empty chamber, but I have no hands on experience with Stillers.

Its a shot in the dark, but we all have to deal with Murphy's Law sometime or another.
 
Watching with interest. Teslong borescope is best gun accessory I ever bought! 50 bucks! Ya can't buy a good dinner for 50 bucks!

Vettepilot
 
Since it is on top of the case, it looks like a scratch from an overlong front base screw. Sometimes, the screw can sheer internally and repeated firings can cause the broken piece to work its way down until it protrudes into the chamber. Pull the bolt, remove the scope and bases and take a look at the front mounting holes.
 
I've never seen the base screw hole go into the chamber on a regular rifle. I have seen it on 2 different tc encore barrels. Even seen a tc encore front sight screw hole drilled all the way through. Being a stiller action it was custom chambered so I doubt very much there is any hole in the shank at all. Not sure a 6-48 or 8-40 could push hard enough on a full chamber wall to dent it. But I've seen crazy things with guns through the years.
Shep
 
Can you mark the case with a marker up against the front of the action opening where the case hits the obstruction, remove the case, hold up against the action (outside) and see where the shoulder/body junction is in relation to the barrel/action....might give you a place to start looking...take a cleaning rod with jag and GENTLY rub area where dent/obstruction starts...kind of like paper clip/ inciepient head seperation check.... rsbhunter
 
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