What's the cure for a chamber that's too tight?
Tight Chamber
- Thread starter onelastshot
- Start date
Probably a custom sizing die would help.
What chamber ( cartridge ) if 6 br it's a case type problem if other not sure what you mean , too tight . Too tight after firing neck sized ammo , too tight that it won't chamber a factory round or other .
If it was professionally chambered I would say it had the wrong reamer , reamer ground wrong , not enough headspace ( easily checked )
More info needed
If it was professionally chambered I would say it had the wrong reamer , reamer ground wrong , not enough headspace ( easily checked )
More info needed
jds holler
Gold $$ Contributor
You haven't given enough information for any good answers, but-- the situation isn't hopeless. Many of us have dealt with this in many different ways. jd
It's a 270 WSM, it's a hunting rifle. When I reloaded the cases after full length resizing, half of them wouldn't fit into the chamber, I can't close the bolt. I've reloaded thousands of rounds and never had this problem
The short mag brass is kinda stout . Are you camming over ? Is the ammo originally shot in your rifle ? If yes to previous then you may need a special die .
If the ammo was shot in another rifle then you resized and tried in your gun it may need a few sizings . I would try to cam over and give some dwell time then rotate the case and size again . Try before loading
If the ammo was shot in another rifle then you resized and tried in your gun it may need a few sizings . I would try to cam over and give some dwell time then rotate the case and size again . Try before loading
Chamber too Tight ? Have you made a cast of your chamber and seen that it is not to specs ? Or are you not sizing your reloads correctly and they are the problem ?
Has been on the internet a few times.
LEE- First make sure the the sizing die is adjusted so that the shell holder contacts the base of the die when the ram is at the top of the stroke when resizing a case.. This ensures that the sizing die is bumping the shoulder back as well as reducing the diameter of the case. If the shell holder does not contact the base of the die, the diameter of the case is squeezed down, making the case (and distance to the shoulder) longer. http://leeprecision.net/support/index.php?/Base/Search/Index
Get a flash light to see.
Some have removed a few thousandth from the shell holder , to fl size.
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I believe the OP stated he has loaded for this rifle and fired brass before. I'm inclined to think it has to be something with either his resizing procedures or his trim length is way off. The chamber isn't going to change other than a possible carbon build up in the leads of the throat.
Darrin
Darrin
Do like 243winxb says and always, run 5-6 sized Brass cases, thru your Gun,.. AFTER sizing Die is set properly, so you don't load, a bunch of, "Bad ones" !
I had this same "problem' in my Tikka .270 WSM and had to screw my sizing Die, down a bit ! The .270 WSM cart. is a HIGH pressure round and needs "proper sizing" for sure as any out of roundness, in the Chamber "shows up" in the sizing process. You "may" have to remove, a few thousandth's off, the top of S-Holder, as stated by .243win., depending on sizing Die brand used/ tolerances. Good luck and let us know what you find.
I had this same "problem' in my Tikka .270 WSM and had to screw my sizing Die, down a bit ! The .270 WSM cart. is a HIGH pressure round and needs "proper sizing" for sure as any out of roundness, in the Chamber "shows up" in the sizing process. You "may" have to remove, a few thousandth's off, the top of S-Holder, as stated by .243win., depending on sizing Die brand used/ tolerances. Good luck and let us know what you find.
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Had this happen to me the bolt would not close after a few shots at the range but could still load fired brass. all was good after a good scrub.
See also Post #7 - just checking whether the cases were fired previously in a different rifle ?
For SAAMI spec rounds, use a Wilson chamber gauge to verify that sized cases are proper length and headspace is correct. For serious work and wildcat rounds, its better to have a chamber gauge cut from a piece of barrel made with the same reamer that was used to chamber the rifle. Rounds verified by these methods should chamber. If not, then you need to look at the rifle and not the sizing die. Start by examining the chamber with a borescope and next make a Cerrosafe chamber casting. The casting should of course be verified as above as well as be direct measurement.
Brass is all new Lapua Brass, never been fired. Length should not be an issue. I don't have a Wilson gauge.
M995
T SNOOK
Sundown
Gold $$ Contributor
A member of our Club had the same problem a few years back. Seems he changed bullet manufacture and didn't actually measure the seating depth required for the new bullets. He wasn't seating the bullets deep enough. He hadn't changed his seater die to the new bullet. After measuring the seating depth and resetting the seater die he was back in business.
Is it a factory barrel / chamber? I would blacken the case and try to chamber , see the rub marks . I'm still guessing it's a sizing issue , make sure your shell holder is touching the sizing die and cams over , rotate the case 180 and do it again .
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