Not really. I think I could pro/con them to death based on features and price but It’s just going to come down to personal preference for the individual user.
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American Rifle Company New Archimedes Action, New Xylo Chassis, and major Mausingfield revision
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Not really. I think I could pro/con them to death based on features and price but It’s just going to come down to personal preference for the individual user.
I got Serial number #69 lol. It will be here Friday. I didn't plan on getting one so soon so I bought a .308 bolt face so I could make another range rifle. Now that it will be here in time for hunting season I wish it was a Magnum bolt face to make a 300wsm. If someone has a Magnum bolt head they want to trade let me know!
I got SN:13 and will pick up Friday the 13th... Ooooo SCARY 
Anyone putting TriggerTech Diamond on their Archimedes?
I just did, but if I close the bolt too fast, the sear would drop on closing of the bolt. Pull weight is at factory pre-set.
Tried with a CE two stage I have lying around and that combo has no issue.
I just did, but if I close the bolt too fast, the sear would drop on closing of the bolt. Pull weight is at factory pre-set.
Tried with a CE two stage I have lying around and that combo has no issue.
Had the same issue with the diamond on the Nucleus. Couldn't get the sear to stay engaged no matter how much pull weight I set it to, ended up getting a Special and set it to 1lb. Will try the Diamond on the Archimedes but I predict it will be the same issue. FP spring may be too light. May have to get another Special.
Put diamond back on and turned pull weight screw 1 full turn CW and now can't get the issue to repro. Don't have a way to measure the pull but it felt a fair bit heavier than before.
That's whats great about the Bix n Andy Tacsport pro. It has a separate sear engagement screw, so you can keep the pull weight as low as you want, and then adjust the engagement. Works perfect.
My Nucleus + TT Diamond without a barrel did this until I put a barrel in it. No issues 600+ rounds later.
Inform me instead of mock me? The firing pin drop wasn't repeatable once the barrel was properly headspaced.
Yes, this is something I demonstrated when I installed the barrel and the firing pin stopped falling when closing the bolt.
I want to be clear, when my Nucleus + TT without barrel installed firing pin dropped it was ONLY when running the bolt very hard/fast and even then it was not repeatable but occasional.
Fired a few down mine today, and Im liking it. 6.5x47 runs flawlessly with Alpha and AICS mags. Triggertech diamond did not show an issue. This action is stupid smooth and can be ran fast. The pivoting bolt handle barely moves and you dont notice it. This feature may aid in extraction, but honestly does nothing for the feel of the action. I do believe this is going to be one of the actions to beat. Ive been running a Mausingfield since it came out, and will be using an Archimedes now. I bought several Archimedes actions with plans to build a few, but got impatient and built on other actions. However, I am keeping this one.
For what its worth, the shouldered barrel for my mausingfield wouldnt headspace on this action. I also have a shouldered prefit for a tl3 that wouldnt headspace without hacking it out alot. I did have an old barrel with savage threads setup for a barrel nut that I was able to use for now. This is not an issue for me, as I will have a new barrel shouldered anyway. But, I am curious to see if anyone else has the same issues.
For what its worth, the shouldered barrel for my mausingfield wouldnt headspace on this action. I also have a shouldered prefit for a tl3 that wouldnt headspace without hacking it out alot. I did have an old barrel with savage threads setup for a barrel nut that I was able to use for now. This is not an issue for me, as I will have a new barrel shouldered anyway. But, I am curious to see if anyone else has the same issues.
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What generation Mausingfield do you have? How far off is the headspace? IIRC all of the ARC actions are supposed to have the same shouldered headspace.
Interested in the head space news as well. Already have a bunch of MFs and Nukes with associated barrels and spares.
I'm waiting to pick mine up from the FFL, as I'm currently out of pocket, but after seeing some of the pics, I'm feeling like we are getting more than we thought we were with this action when we put down for the pre-sale. Meaning, I wasn't expecting the integral lug and I definitely wasn't expecting the keyed scope rail. In my opinion that's the best system design on the market.
I'm waiting to pick mine up from the FFL, as I'm currently out of pocket, but after seeing some of the pics, I'm feeling like we are getting more than we thought we were with this action when we put down for the pre-sale. Meaning, I wasn't expecting the integral lug and I definitely wasn't expecting the keyed scope rail. In my opinion that's the best system design on the market.
That’s basically how I feel for my upcoming 300 PRC build. There are a lot of excellent actions on the market, but damn if this one doesn’t have a hell of a feature set to beat.
Got mine today. Don't have a stock yet, but I mocked it up with a TT special trigger. I could get it to drop on the close if I ran it fast with the trigger set at the lowest setting. I came up three clicks and the problem stopped. This is my first custom, coming from savages. Is this normal?
So what you are saying is that with the TL3 barrel if you back it off one full rotation then you can close the bolt? So hypothetically you could use TL3 shouldered Prefits with a small spacer to set the correct headspace? If possible do you think you could get that measurement?
Yes you can do that, I've done it before with a TL-3 prefit on my Mausingfield. The MF, Arch, and Nuke all have the same barrel specs.
It would be interesting to hear how the bolt lift is with a really hot load but I am mostly concerned with a good solid primer strike, I don't want a heavy weight firing pin spring band-aid.
Thank you for the info, with the increase in availability of TL3 Prefit barrels I could see this as a viable option for using them with ARC actions.
Since primary extraction doesn't happen on bolt lift, there should be very little sliding friction between the extractor and case rim on bolt lift and no resistance due to primary extraction. If it has reliable primer strikes with a light firing pin spring and is otherwise similar to the Nucleus, it should have a very light bolt lift.
The only way to beat it might be to go to a two lug action with 90° bolt throw so the cocking force is spread over 18° more throw.
I think I'll take the small penalty for three lugs and a shorter throw.
The only way to beat it might be to go to a two lug action with 90° bolt throw so the cocking force is spread over 18° more throw.
I think I'll take the small penalty for three lugs and a shorter throw.
it seems that cocking bolt lift is the main thing that most people focus on, so Ill say this. I have Mausingfield and a Bighorn Tl3 for comparison. The Tl3 also has a heavier spring than it came with originally, because I had light strike issues with SAUM rounds. Of the 3, the bolt lift feels heaviest on the Archimedes. However, I like The features of the Archimedes best of the 3. The shorter throw and 3 lug just feels better. Time will tell on reliability.
I have a feeling that reliability was prioritized in the design of this action instead of those butterfly bolt lifts that have been giving people issues
I have a feeling that reliability was prioritized in the design of this action instead of those butterfly bolt lifts that have been giving people issues
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Looks like the Nucleus bolt head will fit in the Archimedes but not the other way around. Has ARC/Ted said anything regarding that topic?
Nucleus on the left, Archimedes on the right. These are 0.535" (nucleus) and 0.378" (archimedes) bolts.
Nucleus on the left, Archimedes on the right. These are 0.535" (nucleus) and 0.378" (archimedes) bolts.
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Looks like the Nucleus bolt head will fit in the Archimedes but not the other way around. Has ARC/Ted said anything regarding that topic?
Nucleus on the left, Archimedes on the right. These are 0.535" (nucleus) and 0.378" (archimedes) bolts.
Your images didn’t come through as far as I can tell.
The parts section on the ARC website says the extractor is shared, but has the bolt heads listed separately.
Just for grins, anyone with a previous-rev Mausingfield and an Archimedes want to check rail compatibility?
Thanks, edited and added links. Works fine on desktop, looks like mobile doesn't play well with embedded imgur links.
It could be that the barrel adds mass to absorb the inertia of the bolt slamming forwards. You can see this with adding a stock or chassis too.
You're going to want to install a barrel and stock/chassis before running that test.
Installed and headspaced a barrel in it. All that I am missing is the stock. Would that cause an issue?
Did your action ship yet? Its on the shipping
I ordered a RH LA, got the serial# with updated
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