Coupe De Grace Brass Ejection Direction Tweaks?

[MilSpecOkie]

Has anyone found a way to send ejected brass to the rear more? I don't know if shortening the mechanical ejector somehow change the throw of the brass? Anywhere from 3-5 O'clock would be nice.

 

[Supersubes]

Where does your go? Does it change with bolt speed? Mine goes to ~4:00 if i recall.

 

[jetjock07]

I’m in the same boat. Mine ejects forward regardless of bolt speed. 130-230 direction but I’d say more around 2. I’m having to run a brass catcher at matches

 

[jetjock07]

They was a guy in the main CDG thread with same issue that replied to me regarding this, that order another ejector and was going to tweak it to see if he could improve the direction of the brass but haven’t heard from him

 

[357Max]

They was a guy in the main CDG thread with same issue that replied to me regarding this, that order another ejector and was going to tweak it to see if he could improve the direction of the brass but haven’t heard from him

That was me. I did the first cut attempt on the new ejector. Shortened very slightly and angled it a little to hit outside edge of rim. Unfortunatly that resulted in no noticeable change. Still get 2:00 ejection. I’ll try another cut soon.

 

[ShtrRdy]

Is the brass bouncing off the side of the receiver or is it slipping off the extractor and getting launched by the ejector?

 

[357Max]

Is the brass bouncing off the side of the receiver or is it slipping off the extractor and getting launched by the ejector?

Not hitting receiver, it gets launched by ejector. Might have more to do with how the extractor releases it.

 

[jetjock07]

ShtrRdy, mine isn’t slipping off but can’t speak for the OP.

 

[ShtrRdy]

I don't have one of these actions so I'm just going off of what I've experienced with other brands.

It seems the extractor needs to hold onto the rim of the case long enough for the angular momentum to carry it out the ejection port. At least in the 3:00 direction.

Take the bolt out and hook a fired case under the extractor and rotate it so that the base of the case is against the bolt face. Now you van try just releasing the case to see what it does or slowly letting the case rotate.

 

[4O6shootist]

I don't have one of these actions so I'm just going off of what I've experienced with other brands.

It seems the extractor needs to hold onto the rim of the case long enough for the angular momentum to carry it out the ejection port. At least in the 3:00 direction.

Take the bolt out and hook a fired case under the extractor and rotate it so that the base of the case is against the bolt face. Now you van try just releasing the case to see what it does or slowly letting the case rotate.

Do a lil Google foo on how a mechanical blade ejectors work, and try that again.......

 

[Evintos]

Not hitting receiver, it gets launched by ejector. Might have more to do with how the extractor releases it.

That's what I'm thinking. Extractor under spring tension applying consistent inward lateral pressure throughout the ejection arc. Basically extractor is pushing the case slightly back in as the ejector pushes the case over the breakover angle and the result is a outward and forward ejection.

The test would then be to use a weaker extractor spring so there is less lateral pressure.

 

[Evintos]

The CDG doesn’t have a traditional coiled spring powered extractor. It’s a metal leaf spring type.

It has a (high rate) coil spring powered extractor unlike Ted's previous actions. You should be able to see the spring in the bolt head as it's partially exposed. The choice of the high rate spring is what leads me to believe it's extractor spring related.

#21, part 015-10222 rA

https://www.snipershide.com/shooting/threads/coup-de-grâce-new-action-from-american-rifle-company-899-wow.7155247/page-3#post-10663973

 

[MilSpecOkie]

I’m a dumb ass. I was thinking of my Nukes and Archimedes. I’ll go delete it now.

 

[4O6shootist]

Possibly change the geometry of the ejector blade to manipulate ejection path? Perhaps shorten or change to where it catches the case head as bolt comes rearward. I'd think if it was catching the case closer to edge it's go further laterally instead so far forward of ejection port perhaps? Idk......

 

[jetjock07]

Yeah I figured calling ARC and leaving two messages I would have gotten a call back by now. Figured if anyone would know what to do it would be them

 

[MilSpecOkie]

Where does your go? Does it change with bolt speed? Mine goes to ~4:00 if i recall.

I missed this. I’d say 2:00-2:30 shooting 22GT.

 

[Supersubes]

I missed this. I’d say 2:00-2:30 shooting 22GT.

Thanks.


I keep forgetting to pay attention to mine. I’ll report back when do. I could be dead ass wrong….

 

[MilSpecOkie]

If I go really slow it might fall out at 3:00. I have a local match this weekend, my first with the CDG, and that will tell me more. Running it fast will surely bring out its true colors.

 

[Supersubes]

I missed this. I’d say 2:00-2:30 shooting 22GT.

Id call mine 2:30 to 3:00. Checked it this morning a bunch of times.

As far as angle up and out of the port, it appears to be coming straight out at 3 oclock(if youre sighting straight down the barrel from the shooting position), so it touches the ground only about 18”-24” from the gun. All this was observed while running the bolt fast.

 

[lash]

That’s not bad. I could live with that. I haven’t picked mine up yet as I’m not home right now.

 

[MilSpecOkie]

Playing with my CDG I have two ejection patterns with 22 GT brass when running the bolt back quickly:

Spent brass mostly ejects at 2:30 with the occasional 2:00 O'Clock
Dummy rounds mostly eject at 3:30 with the occasional 3:00

We shall see during the match tomorrow what happens in real world situations.

 

[jetjock07]

Playing with my CDG I have two ejection patterns with 22 GT brass when running the bolt back quickly:

Spent brass mostly ejects at 2:30 with the occasional 2:00 O'Clock
Dummy rounds mostly eject at 3:30 with the occasional 3:00

We shall see during the match tomorrow what happens in real world situations.

Same issue with me running 22BR. Spent brass 2-230 and dummy rounds 3-330 where they should be.

 

[MilSpecOkie]

Did you see in the other post that Thisguy is running an extra dope card as a deflector to help with brass loss? I am trying one today as well. Living room floor tests yesterday give me high hopes.

 

[MilSpecOkie]

https://www.snipershide.com/shootin...ompany-899-wow.7155247/page-116#post-11177295

Post 5769

 

[Praeger]

Recently built a CDG 6 BRA rifle and am working through the somewhat anemic ejection of the CDG (at least with the short cased 6 BRA). After taking a slow motion video of the ejection, it appears that the case makes a 180 degree spin whereupon the neck of the case (now rearward facing) bounces off the bolt head reversing its direction and causing it to move away from the action at the 2:30 direction. It looks similar to an AR15 ejection where the ejected case hits the brass deflector.

I couldn't upload the movie file so attaching screen shots. It's a little fuzzy but you can see the case pivot, then change direction as the case neck hits the bolt head.

 

[jetjock07]

Wish they would come out with a fix

 

[Supersubes]

Wish they would come out with a fix

I thought they had? Isn’t there a new design ejector that’s been coming in all the recent actions?

 

[357Max]

I thought they had? Isn’t there a new design ejector that’s been coming in all the recent actions?

That’s a new extractor AFAIK.

 

[Supersubes]

That’s a new extractor AFAIK.

Do you mean @Praeger’s is the new one?

 

[lash]

Do you mean @Praeger’s is the new one?

Ejector vs. extractor.

 

[Supersubes]

Ejector vs. extractor.

i haven't been following at all. Only remembered some talk of one or both parts being new.

 

[lash]

i haven't been following at all. Only remembered some talk of one or both parts being new.

From memory, assuming it’s correct, extractors on the magnum and Lapua bolt heads were replaced on newer releases to eliminate the possibility that heavy recoiling rounds would displace the ball and spring and cause extraction issues.

 

[Praeger]

Do you mean @Praeger’s is the new one?

The extractor was updated. No updates that I'm aware of to the ejector.

 

[Supersubes]

From memory, assuming it’s correct, extractors on the magnum and Lapua bolt heads were replaced on newer releases to eliminate the possibility that heavy recoiling rounds would displace the ball and spring and cause extraction issues.

I got new extractors for all of my bolt heads 223 and up. I think you’re correct on the reason though.

 

[KnowNothing256]

The frame-by-frame (much thanks @Praeger) makes it look to me like the extractor is letting go early; the case head starts moving away from the ejection port (clearly coming out from under the extractor), so the case spins inside the action. I'd rather see it more like a door hinge: the case pivots around the extractor, then lets go only after the case center of mass is out of the action and traveling rearward.

I'd have to compare against another action with a fixed ejector and see what that slo-mo looks like, but that's the picture in my head.

 

[Praeger]

I got new extractors for all of my bolt heads 223 and up. I think you’re correct on the reason though.

The frame-by-frame (much thanks @Praeger) makes it look to me like the extractor is letting go early; the case head starts moving away from the ejection port (clearly coming out from under the extractor), so the case spins inside the action. I'd rather see it more like a door hinge: the case pivots around the extractor, then lets go only after the case center of mass is out of the action and traveling rearward.

I'd have to compare against another action with a fixed ejector and see what that slo-mo looks like, but that's the picture in my head.

I wish I could upload the video, but you are correct in that as soon as the ejector blade pushes the left side of the case the entire case spins (mostly in the open ejection port) until the neck strikes the bolt head. When the case begins to spin, the right side that is captured by the extractor during the extraction, spins out of the extractor's control - it does not pivot on the extractor. My first experience with a mechanical ejector so no frame of reference if this is common to mechanical ejectors.