headstamp disturbance

[tbirdman74]

Hi everyone, new here but have read everything I could here. Love it. Also love my thumper. Couldn't ask for a better firearm. Only have 25 rounds down the tube but after 10 sighters was breaking clay pigeons set out to 200 yards. Only problem is I'm have some ejector swiping on the cases. No other problems at all. Shooting factory hornady 250 gr FTX out of 20" Bushmaster complete rifle. Will it go away after awhile as the action wears itself in? Tried to get a picture, but with zero success. Got to find my good camera. Any help is good help. Thanks all.

[Hoot]

Make sure the chamber is not only clean, but free of anything resembling lubricant, including leak-back from cleaning the bore. With the chromed chamber, you need the cases to hold on for dear life. Don't lube inside you magazine either. Some folks disassemble, clean and lightly lube the spring and walls to make them run smoother. That rubs off on the cases. Lastly, sometimes new bolts have a burr around the ejector hole that's higher than the rest of the bolt face. I've seen them, though not in my 450b. That raised burr can lightly swipe the heads even when everything is clean and running fine. Look under a magnifier or micro-viewer for a burr. If you have one, remove the ejector plunger and spring and chase off that burr. There are a host of ways to do that.

Hoot

[tbirdman74]

Thanks hoot, been thinking a burr might be the culprit, haven't had the ambition the tear bolt apart, recovering from a little back surgery two weeks ago. Thoroughly cleaned when I got it, was covered in gunk from factory.

[Texas Sheepdawg]

Welcome to our Electronic Campfire, T Bird. We have a lot of good guys in here who can help you get down to the source of the issue. Hoot, its your tuen to make the S'Mores.

[Hoot]

Welcome to our Electronic Campfire, T Bird. We have a lot of good guys in here who can help you get down to the source of the issue. Hoot, its your turn to make the S'Mores.

While I'm all for the jocularity and esprit de corps displayed here, guys I gotta tell you. I hate smores. The metaphor is not lost on me though. I'll just sit back and get lost in the crackling fire.

Hoot

[9x19MdM]

Thanks hoot, been thinking a burr might be the culprit, haven't had the ambition the tear bolt apart, recovering from a little back surgery two weeks ago. Thoroughly cleaned when I got it, was covered in gunk from factory.

Welcome and good luck on the recovery! I had a lumbar microdiscectomy back in Oct and once the staples were removed, things got a lot better.

[tridentarmory]

ive seen a few issues with the problem hoot is explaining... he's right on the money with that one..

ive also seen a couple extractors that were not cleaned after being groved....another potential issue that you can check for at the same time.
additionally, sometimes yes, the issue may just resolve, but occasionally small issues become big issues, and thats worth trying to avoid all together.

hope it works out for you, and welcome to 450bushmaster.net

[commander faschisto]

Ok...I'm going to have to rethink this whole "Hoot" issue here....doesn't like S'mores....

That aside, the extractor on my 20" camo bushy's bolt showed up NCO: Neat, clean and orderly...no problems whatsoever. Only had light coating of what smelled like CLP on it, and no burrs, etc. Must've been a good day on the assembly bench.

[tbirdman74]

Yep, one big burr all the way around the ejector hole. Looks like they drilled it with a hatchet. Time to tear it down and clean it up.

[9x19MdM]

Yep, one big burr all the way around the ejector hole. Looks like they drilled it with a hatchet. Time to tear it down and clean it up.

Can you post a before and after pic?