Came home to measure the rims. Winchester were thicker by .003". I guess this was the deal maker & breaker of the ejection situation. 

This does come after mounting the no drill scope mount, but as I understand it, the ejection of an empty case is done via the indent in the receiver, and the ejection of a loaded case via a slight protrusion of the ejector screw/bolt. I got this right? I just wonder why the Remingtons ejected before and not now. The ejector bolt is no longer protruding at the rear with the scope mount. Maybe the Rems were needing that ejector bolt assist? 

ETA: Just found this from another forum. Seems I found the same .003" difference between Win and Rem:

Weak or no ejection is usually caused from a weak extractor spring, that is what pushes the case to the left side of the body.  You could try changing the spring. 

Check the diameter of the rim and the diameter of the case body just in front of the rim on these two different cases.  It's possible the Remington cases are a bit smaller here and result in less contact pressure from the extractor.  

The ejector screw is indeed needed to eject a loaded round.  It's possible it might be an aid to eject an empty case should it not flip out from the friction force of the rim dragging on the action. 

Rim thickness is what affects the "head clearance"; that is the space between the bolt face when locked and the back of the cartridge case.  If you reload, you want this clearance to be small to minimize how much the case stretches on firing.  

From feel of the extractor the spring is stout. 

I measured .450 & .451 between the two cases just under the rim. Forgot to measure the OD. 

For some reason, they all don't eject now. LOL! 

It needs friction to get the empty case ejected, plus it should be a quick pull back on the bolt.

If slow, it won't eject until it hits the screw.

Oh I bet it's got some grease on it. 

At the moment, quick bolt speed doesn't eject either. 

I'll try to JB weld a nub on the end of the screw. 

Excess grease/oil could also be the problem.  

Extractor spring is stiff as per test instructions. 

All grease removed.

Still doesn’t eject a spent case. 

Has it ever?

I ask because there's a same threaded screw used elsewhere but it lacks the "nub" which pops the Un-Fired case out.

Oddball Enfield feature the ejector doesn't eject fired she!!s! Just un-fired ones!

Are you testing with fired cases of action proving dummies?

Yeah, no problems till I put this dam scope mount on. Thing is I can't use irons anymore. Gotta have a scope. 

I'm firing my handloads, and using that fired brass also to test the ejection. 

On a positive and separate note, I did measure my bolt and have .630" bolt head and .0015" headspace gap. The weird thing is the bolt head is a #3 but with #2 size bolt head length. 

How far does the case rim overhang the left side of the bolt head with the bolt removed and right side of case rim just contacting the extractor? 

We are missing something here….

Tried to upload a pic, but no joy. 

I measured with calipers .050 overhang

Does a spent case even begin to angle itself out?  

Does a spent case try to hit the scope mount?

The cases angle to the right upon rear travel but there’s no flip out the side. Just backwards and lay on the follower. Case mouth facing shooter.

Totally clear of the scope mount. 

I only got two screws with BadAce and I cut too much off the longer one. 

300-400rnds on 1954 No4MK2 new in wrapper. 

2. I'm also suspecting the receiver might have been cut with too shallow an indent. Prior to the scope mounting, with the stock ejector, that ejector might have been the only reason it ejected to begin with. 

Way easier to troubleshoot number one. lol

Again Ejectors don't eject fired cases, the rim should clear & flip free before coming that far back even.

There are many riffles that don't even HAVE one fitted & they work.

I'd suggest the spring & check for chipped of blocked with crud extractor hook & the cut in the rear right of the breech it rides in as well, but with extraction being good its a second choice.

If you're concerned with rim dimensions I can mail you a few fired Mil Spec ones to check it out.

As you can imagine. I have watched many times the brass moving rearward and not touching anything on the scope mount. I would have had this mystery solved long ago should this be the case. The path for the brass is same as any non scope mount Enfield and unobstructed. 

This is driving me nuts. 

I'll take a video and see if that can load up here on the site from Youtube. 

As an aside, I appreciate the info on the differences between the different case manufacturers.

MidwayUSA sells reproductions of the ejector spring from Wolff.  I picked up one for my No1 MK3 about 2 weeks ago.  It looks like they are now currently out of stock on those as well as the ones for the No4/No5 rifles.

Numrich seems to have them in stock though.

Best,

I just have the serialized one. 

No worries! I'm bout to head off on a hog eradication trip anyway. 

I did bend the extractor spring to give more force. They all are clearing the action a bit better. Bouncing to the 1:30-2:00 position from muzzle, but still not slinging out the way. More blooping out the side. I hope it's enough as I'm taking it with me to canyon stalk some hogs. Close range shooting with the irons! (Leaving scope mount off, I got plenty of precision rigs)