Coup De Grâce 223 action experiences?
- Thread starter jzerfoss
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I have about 800 of .223 AI through mine.
The AI shoulder causes a slight “hitch” when loading it slow. Run the bolt like you mean it and it feeds great.
Use accurate .223 mags like suggested from ARC.
Mine is a 22” competition contour that I regularly shoot to 1000.
The AI shoulder causes a slight “hitch” when loading it slow. Run the bolt like you mean it and it feeds great.
Use accurate .223 mags like suggested from ARC.
Mine is a 22” competition contour that I regularly shoot to 1000.
The shoulder going into the chamber. If you run the bolt like normal you don’t really notice it but if you try and slow feed it can cause problems.
This might be an .223 AI issue though not regular .223.
I have a 223AI CDG, currently in a KRG Bravo. I’m using the MDT magazines: https://mdttac.com/223/ both the metal one with the plastic insert, and the plastic one. In my experience, the key is tuning magazines to the action.
If you compare the plastic insert feed lips on the metal magazine extend further toward the front of the mag compared to the plastic mag. This causes the metal mag to hold on to the cartridge longer in the mag before allowing the cartridge to slide up the bolt face and align into the chamber. This is why the plastic mag is rated to feed 223AI and the metal/plastic mag is not (according to the notes on KRG’s website). I trimmed the metal/plastic mag’s feedlips back until they match the size/shape of the feedlips on the all plastic mag. I also trimmed the back edge of the magazine slightly to allow the magazine to seat deep enough into the bottom of the action to present the loaded rounds properly and engage the mag catch.
Both mags feed 223 and 223AI just fine now. 223 AI loaded with 88ELDMs seated out to 2.50” OAL.
I use the MDT plastic mags to feed 223AI into a Tikka (in a KRG Bravo as well). Feeds great. Heck, I’ve even got a hybrid magazine that allows me to magazine feed 20 VarTarg into a Tikka/KRG Bravo. Works fine. Accurate, too.
If you compare the plastic insert feed lips on the metal magazine extend further toward the front of the mag compared to the plastic mag. This causes the metal mag to hold on to the cartridge longer in the mag before allowing the cartridge to slide up the bolt face and align into the chamber. This is why the plastic mag is rated to feed 223AI and the metal/plastic mag is not (according to the notes on KRG’s website). I trimmed the metal/plastic mag’s feedlips back until they match the size/shape of the feedlips on the all plastic mag. I also trimmed the back edge of the magazine slightly to allow the magazine to seat deep enough into the bottom of the action to present the loaded rounds properly and engage the mag catch.
Both mags feed 223 and 223AI just fine now. 223 AI loaded with 88ELDMs seated out to 2.50” OAL.
I use the MDT plastic mags to feed 223AI into a Tikka (in a KRG Bravo as well). Feeds great. Heck, I’ve even got a hybrid magazine that allows me to magazine feed 20 VarTarg into a Tikka/KRG Bravo. Works fine. Accurate, too.
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Hmmm. I am using the MDT metal/ plastic mags. Don’t know anyone with a full plastic mag. Wonder what it would do with those.
I don’t have feeding problems. It’s just not butter smooth when running it slow.
Just got my 223 action in and going to build a regular 223 Wylde. It's mainly going to be a trainer for PRS and if I get a wild hair to shoot TAC class I can. I already have a 6br and 25cm built on CDG actions and the AW mags fixed any and all feeding issues.
I'm hoping and praying Gray Ops builds a 223 and 308 case version of the Billet mags they have in 6br, yes they are worth every penny!
I'm hoping and praying Gray Ops builds a 223 and 308 case version of the Billet mags they have in 6br, yes they are worth every penny!
This is what I changed to the mags to allow them to function reliably in my ARC CDG.
Does this allow the round to come out and align more with the bore earlier?
Mine is coming in the chamber at a sharp and and dragging in the bullet.
Yes, by moving the front edge of the feed lips on the metal mag to the rear (by cutting them), the metal mag releases the round at the same time as the composite mag in the photo.
In the original configuration, the metal mag was holding onto the back end of the round too long, forcing the steep chamber entry angle to develop.
The plastic composite mag is rated for 223AI, the metal one was not. By modifying the mag lips as shown, the metal mag feeds 223AI just fine.
I had to modify the rear edge of the composite mag feed lips as shown in the photos. The rear edge was square, and the bolt body was snagging on the rear edge of the mag lips. By breaking that angle to a 45, the bolt rides over the mag much better.
I had to modify the rear edge of the composite mag feed lips as shown in the photos. The rear edge was square, and the bolt body was snagging on the rear edge of the mag lips. By breaking that angle to a 45, the bolt rides over the mag much better.
I built up a CDG in 223AI, too. I'm trying to use accurate magazines .223 mag. IIRC, that's what ARC recommended. It fed unformed brass just great. Doesn't feed fireformed brass worth a hoot. About every other round hangs up hard. Unfortunately, I don't have any mags that do work, so I'm in the dark about how much to cut back the feed lips.
Would you be willing to post a video of your rifle feeding? Mine, set up very similarly with the same mags, doesn't feed well at all.
Since my last post I've had the opportunity to try several different magazines. The only one I've found that functions at all is an old AI polymer .223 magazine. As I understand it, they are no longer made.
Just so I’m tracking, is 223 feeding just swell through Accurate Mags? I know some are discussing 223AI.
I shoot a lot of 204 through Accurate Mags in a R700, and I’m not sure if the CDG is really ideal for that round?
Btw for max reliability I have to shave the plastic insides of an Accurate Mag to fit the further-forward 204 shoulder, but don’t touch the feed lips.
I shoot a lot of 204 through Accurate Mags in a R700, and I’m not sure if the CDG is really ideal for that round?
Btw for max reliability I have to shave the plastic insides of an Accurate Mag to fit the further-forward 204 shoulder, but don’t touch the feed lips.
My experience was that .223 feeds nicely in the Accurate Mags. 223AI doesn't feed at all.
I purchased a MPA in .223. It uses the ARC CDG action. It shipped with a plastic MDT magazine, and a pivoting bolt handle. I had nothing but problems with the MDT mag in my particular rifle. I returned the first magazine to masterpiece arms, and they graciously replaced it with another. It worked okay for a short time, then started to exhibit the same problem as the first magazine. The plastic gets a groove worn in the top and this affects the seating of the mag. I got on the ARC website and used the magazine that they specify for this action/caliber and haven't looked back. I got the metal accurate mag #00100-0037. I understand the reason for trying to ship the rifle with the MDT mags, as it has a 2.5" overall length capacity. Having said that, it took me about ten minutes or less to file out the accurate mags to accept bullets up to 2.5". I was having some weird issues getting the Bix N Andy trigger adjusted. The ARC website also states the pivoting bolt handle should not be used with a Bix N Andy trigger, so I replaced it with a fixed bolt handle. I probably have 2000 rounds on this rifle now, and it works like it should now. The rifle was tricky for me to tune, for some reason, but it will shoot 1/2 MOA all day long without much effort. Very happy with this action.
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Took my misbehaving .223AI to a local smith (shoutout to Shane at Harless Precision in Colorado Springs). We fiddled around with it yesterday. ARC had mentioned radiusing and polishing the extractor. Shane had the brilliant idea to remove the extractor completely and see how it fed. Like butter. You'd never know it had a feeding problem. He's going to work his magic on the extractor, and we're both pretty confident he can make it run with the Accurate Mags.
How did the extractor mod work out for you? Pictures of the modification would be a great follow up to this thread.
I think part of the fundamental problem here is that a CDG has a larger diameter bolt body (not bolt head) then a traditional 2-lug Remington clone or others. A magazine seated with the feed lips close to the bolt body cannot get as high in the CDG action (as close to action center line) as with the magazine close to a .700” diameter Remington style bolt. This causes the round feeding out of the mag to have a slightly steeper angle when exiting the mag and entering the chamber. I think a fix for this is to move/cut the mag feed lips further to the rear of the mag. This causes the mag to release the case head sooner in the feeding cycle, and keeps the feeding angle lower. A smooth bolt face and polished extractor can only help as well.
I'm running a 20 Practical on a CDG action. I first had it in a Xylo chassis where it fed well from a 10 round accurate mag after shortening the magazine latch on the Xylo. I tried a 5 round accurate mag but it would not seat so I punted on that because I didn't want to shorten the mag latch any more since it was already as loose as I could accept with the 10 rounder. My Pmag's and MDT mags would not seat either.
I have since mounted this barreled action in a MDT Premier Gen1 chassis I had leaning on a wall in the bunker. I had to shorten the mag latch on this chassis a bit also to fit the 10 round accurate mag. After doing this I tried the 5 round accurate mag, the MDT mag and the Pmags. They all fit great and feed great. Very happy I made that change.
I have since mounted this barreled action in a MDT Premier Gen1 chassis I had leaning on a wall in the bunker. I had to shorten the mag latch on this chassis a bit also to fit the 10 round accurate mag. After doing this I tried the 5 round accurate mag, the MDT mag and the Pmags. They all fit great and feed great. Very happy I made that change.
I built an ARC CDG on Xylo chassis with PVA .223 Ackley Improved barrel this fall. I now have ~350 rounds through it. After installing the "AICS stop tab" and filing 0.060" off the top of the mag latch, as recommended by ARC, it feeds regular .223 Rem and .223 AI perfectly from the Accurate AICS mags.
I am running a long throated .223 and have been running the ruger ai style polymer .223 magazines. You have to trim a little bit off the back of the magazine to clear the ramped feature at the back of the mag well and file off a very slight amount off the top of the feed lips to give the bolt clearance. I altered the mag to fit instead of the catch.
I also am using a MDT polymer mag that took similar modifications and also filing the mag catch location on the magazine higher. With these mods it also works very good.
I also am using a MDT polymer mag that took similar modifications and also filing the mag catch location on the magazine higher. With these mods it also works very good.
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