The feel of it is a bit loose but the bolt moves very freely in and out of battery because of the anti-bind rail design. Not much to go wrong and that's their budget action. It also has one of the most robust bolt stops available and the extractor and ejector designs are very robust too. They usually are unless you choose parts that aren't quite right.įor instance, the ARC Nucleus has has light primer strike issues but only with certain triggers. Custom actions are designed to be world class. I wouldn't worry too much about reliability. The Archimedes is evidently getting an integrated recoil lug which I see as an upgrade but I was ok without it.Īll are suitable but the Mausingfield seems to be focused to hunters now, Nucleus is the budget action with lots of unique features while Archimedes is even more feature filled and seems built for the highest pressure rounds that might cause hard extraction on traditional actions. The Mausingfield does not seem to have the 2018 style interchangeable rails, it's now an open top design. The Archimedes seems like the best extraction solution, it also is a tube style action so it has most of the strength you would get with an integrated rail action but the flexibility of being able to change slope if you need to.īoth the Mausingfield and Archimedes got a bit of a re-design after SHOT show due to customer feedback on the 2019 Mausingfield redesign shown there. The Nucleus has the same extractor but it uses bolt lift to do primary extraction so the extractor has to slide on the case rim while it is extracting (like most modern actions) and the Mausingfield has a non-rotating Mauser style extractor but it uses bolt lift for primary extraction. The ARC Archimedes is CRF like the Mausingfield and the extractor is just as good or better because it doesn't do primary extraction on bolt lift.
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