Effects of ejector button in bolt to cartridge alignment

[Wolfdawg]

Has any done any testing on the effects of the ejector button in bolt to cartridge alignment within the chamber?

There is at least a "little" play in the chamber to cartridge fit, so if the ejector pushes on one side of the cartridge base, wouldn't it "mis-align" the cartridge in the chamber?

How about a stiff ejector compared to a lighter spring?

Just wondering if anyone has made any comparissons on accuracy based on this???

Wolfdawg ???

 

[Preacher]

I would think that a factory chamber would have that little bit of play you mention, but a good custom cut chamber will not have much wiggle room in the chamber if lots of attention was paid to reloading the cases....
Also it would seem that when the bolt was in battery it would be pushing hard against the case and not allow very much movement..
A stiff ejector spring will cause more dinged up brass necks than anything else will when they are withdrawn..
I use a light spring in the rifles that use a ejector so the brass stays in the action tray and don't hit the ground and cause more problems....

 

[Cheechako]

Wolf

Custom made "accuracy" rifles generally have the ejector spring shortened or removed entirely. Factory rifles have such sloppy tolerances and poor barrels that something as insignificant as ejector pressure can hardly be noticed where the bullet meets the paper.

JMHO

Ray

 

[olddog]

I have not done any accuracy tests on the influence of ejector pin pressure on the cartridge.

I do remove the ejector spring because as Preacher has said, the brass mouths get abused and I don't like picking my brass up off of the ground.

But then again I only shoot single shot.

 

[Wolfdawg]

Thanks for the info!

I, too shoot single shot competition 1000 yard benchrest. I get those ejector rings on the base of the cartridge cases after firing.
I realize that match chambers have very small tolerances, but there are tolerances none the less. There has to be some room around the cartridge case or it would go into the chamber. I know we are talking about extremely small measurements (.00x").

At the very least, an ejector places stress on a case on only one side of the base. We spend countless hours preping, loading, and measuring the brass and its inevitable runnout.
We look at runout on dial indicators on roller bearings...BUT...when the cartridge goes into the chamber with an ejector pushing on it, doesn't that induce an offset, uneven pressure, or whatever????

Myabe this is a mute point, maybe it doesn't matter, or maybe it does??? I just wondered if there were ever any known testings done on this subject. There seems to be testing on every other "little" thing in this accuracy game.

Guess I know what's coming next...Why don't I do some testing? Maybe...someday... for now there are gardens to plant,decks to build, baseball games to attend, and the occasional 1000 yard match for a distraction... ;D

Wolfdawg

 

[CJ6]

If you wish to lose the ejector marks you can have the ejector hole bushed solid (drill rod then lightly faced).

 

[Cheechako]

Wolf

If you shoot 1000 yards with a tight chambered match rifle, I'd say that the least of your worries is the ejector pushing on your case head. :

Ray