I don't think so, there's no long leaf extractor, plus the lugs are orientated 120° out. This action is 1 lug down 2 up from pics. Nuke/Arch are 1 up, 2 down.
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Coup De Grâce, New Action from American Rifle Company, $899 WOW!
- Thread starter karagias
- Start date
I'm not sure but guessing yes. Current design of the LA mag wells accommodates AI type single stacks for .532 (300 PRC) and .588 (338 Norma) case heads. It's possible to cut a mag well for a true double stack up to .473 (308 Win) heads. Round belly of the R700 foot print does not accommodate larger double stack mags but feed rails/lips can be machined into the receiver for up to .532 quasi-double stack, as in original R700 long action in 300 WM for example.
Ted
That dimension is 4.39mm (0.173in) in the Coup. Highly recommend max sear engagement for safety. Not sure why BnA uses multiple sear bars.
Ted
You are correct. Positive feedback (self-reinforcing effect) ensures engagement with case rim. Nice observation.
Ted
I think so. It's a compact, hardened steel part driven by a ball and spring. The spring has a really high rate and undergoes very little motion as the extractor pivots over the case rim. A portion of the spring remains visible and that was done for easy disassembly/re-assembly, and consequently easy maintenance. Abusively packing the spring area with dirt had no effect on function.
Ted
Depends on the mag and caliber but we're recommending conical breeches. They're essential when using AICS mags. AIAW mags have worked with flat breech faces when running 6.5 CM and similar. Go with conical breeches. We'll work hard on getting barrel drawings on line and to barrel makers. I think 0.588 (338 LM and Norma) will work with flat breech faces as it is hard to miss that big hole.
308 Win breech looks like this but wait for the final drawings.
Ted
I have and love a first Gen Nucleus and am very looking forward to getting one of these. Incredible looks and design features!
Dustyplyr hit that nail on the head, and hit it hard. I hope I'm doing the right thing.
The Coup De Grâce is a fat bolt similar to the AI and in feels a bit like the AI apart from not having to cock on close. The flutes do seem to tolerate lots of dirt. Current design has 0.2mm (0.008 in) of diametral clearance between the bolt and receiver. The bolt does have more support (length/diameter) then our other actions when fully retracted.
We'll be shooting much more over the next couple of weeks so we'll see how goes.
Ted
Maybe but they wouldn't work in this action or any other having a Rem700 footprint. Receiver belly diameter is to small for true double stack 0.532" cases.
Ted
I enjoy the fact that the Nucleus and the Archimedes could always run in the shit. Who do you think knew more about designing robust actions? Mauser with experience of countless 20th century hell-on-earth conflicts or ...
Ted
Yes. The Coup De Grâce is kinda like Archimedes 2.0.
Nope. Totally different receiver.
Hard to say and time. I like the fact that the Nuc and The Arch used flexures as extractor but they are not as robust as the Coup De Grâce in regards to surviving case head separations.
The Coup uses an extractor not unlike that used in the Sako TRG, albeit with much greater case rim engagement necessary for the high extraction forces that one can easily generate wit the pivoting bolt handle. Another difference between the two is that the Coup's extractor is in a bolt lug while the Sako's is between lugs. This is important because when in battery, the motion of the Coup's extractor is limited by the inner wall of the receiver. This, couple with the fact that the extractor is a compact, hardened steel part is what enables it to survive case head separation. That said, some case head separation events can be extremely severe in which case all bets are off.
Any concerns about bolt lug strength due to the extractor pocket are unwarranted. Within the Coup, the bolt lugs always with their battle against the receiver simply because they are much harder and loaded in a more favorable way during explosive events.
Ted
Maybe we should but more testing first. If we do it, maybe we include a "you waive your right to bitch about deliver" clause. Joking of course. We're working hard to put the piece in place to keep these in stock. Makino a61nx just landed and Tsugami swiss is inbound. More turning centers to come soon.
Ted
I have to say that the "Ted Talk" insights are also appreciated.
Back to the hardware: Any PPC bolt faces on the first run? I want to do some kinky grendel wildcat shit to this thing.
It's said, actually well documented, WDM Bell shoot over 1000 elephants with a 7x57 Mauser.
I wouldn't shoot and elephant. I love them, but I also get it.
Ted
Blast from the past. This was my first action design. I never put it into production.
Ted
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Archimedes for sure. No point in making both the Coup and the Archimedes, not for now anyway. But the Archimedes is still a great action.
That said, as the company grows and hopefully becomes better managed, maybe the Arch is reserected. Please like variety and I'm not one to tell their hearts what they should desire.
Ted
Being a Mauser fan, I am interested to find out more about the results of skinny vs fatter bolt diameter and reliability.
-Stan
Ted, I have a single digit Nuke, big fan but this is so tempting that I will probably jump on it. I have a barrel question, my apology for being fuzzybrained on what fits. I have a PVA replacement for the Nuke in 6.5CM that has not been installed yet. Will this fit the new action? Thanks in advance.
Coup is more tolerant of case head separations. Extraction ability is comparable as the Archimedes because both use pivoting handles and must have extractors that are stronger than the case rims. Your ability to extract using either action is limited by the strength of the case rim, not the extractor.
Ted
No, extractor behavior is different than that of the Mausingfield.
Yes, the Coup is kind of like an Archimedes 2.0.
Proof puts out high quality prefits and while I have owned and may buy a PVA barrel for this action; PVA does not have pricing power. I picked up a Zeus Prefit for $450 last month. I couldn’t get that degree of quality and pricing from PVA, SJ, BM, etc.
If Ted can work on a relationship with Proof for this action I have no doubt adoption will be higher than without.
Couldn't get a flexure to cooperate with the bolt lug. Coup's extractor design is similar to that in the Sako TRG. Wouldn't surprise me if there are other predecessors as well.
Ted
@karagias you say it feels a bit like an AI.......the bolt lift on my ATX is insane compared to any quality rem700 clone, including my Arch and Nuke. I hope the coup de grace and AI do not share that similarity, and resembles the bolt opening weight of the Arch.
LOL, it's awesome, and don't let anyone tell you otherwise. It won't be for everyone, Burris put some red accents on their XTR Pro scope, some liked it, some didn't.
Ted if you work out a SH pre-order im in for one with both bolt handles...or better yet one in the XYLO in 6.5CM with both bolt handles!
Same. My backlog of needing optics just keeps getting worse lol.
Thank you for the info, I saw on Instagram that someone mentioned the possibility of a lightweight version in the works. Any info you can share on that?
I'm with you, but I'll have to wait on the long action. Exactly as pictured in post #1.
That 7 Mag barrel is almost gone and it needs to be replaced. Might as well build a completely new rifle.
I feel like Baruka in Charlie and the chocolate factory.
I WANT IT NOW!!!!
Definitely in for one of these or the (lightweight) one mentioned on Instagram.
Off topic Ted, but whatever happened to the M2 action? I've always liked that thing
Off topic Ted, but whatever happened to the M2 action? I've always liked that thing
I think the Xylo is the best chassis no one knows about, but that belongs on a different thread. Back to the Coup...
Ted
I really like conical breeches.
Not to derail, but the BR guys mostly use conical because it really helps that PPC round to go quickly into the chamber without a hiccup.
I bought a Kauger action last year to build a 6-BR and it feeds like greased goose shit on glass. In fact, it works very well with 5 round P-mags.
I highly recommend conical.
Did I mention I like them too?
Impatiently waiting on a Long Action...
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