What's the present autocannon meta? 25mm has universal acclaim in Ukraine.

What's the present autocannon meta?
25mm has universal acclaim in Ukraine.
30x113 straightwalled is a good candidate for replacing all RWS guns like .50BMG/Mk19
35mm straightwalled into 50mm is the OMFV candidate
30x173mm used to be considered the meta, and new cannons like the X-gun use it.
40mm CT used to be considered the future but it's not going anywhere fast.

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  1. 2 weeks ago
    Anonymous

    Leonardo's X-gun is the first new autocannon action in decades. It reduces weight and improves accuracy, but above all it's significantly simpler than a chain-driven autocannon.

    • 2 weeks ago
      Anonymous

      How does it work and can the mechanism be adopted into AR-15?

      • 2 weeks ago
        Anonymous

        Instead of a chain turning cogs like a Bushmaster autocannon, or a open bolt driven by a nub on a lever like most machineguns, the cylinder you see with an X cut in it is the power source. An external motor turns it to move the cam around. One operation is carried out every 270 degrees of turn: feeding the round, ramming it, giving it some dwell time for the firing (it has a rotary bolt), and then extracting it.

        • 2 weeks ago
          Anonymous

          So, it's kinda like a cross between a chain gun and a revolver cannon, using a single chamber?

          • 2 weeks ago
            Anonymous

            nta but no, I think that barrel doesn't ever hold a shell, so comparing it to a revolver is a bit wrong.

            It sounds like a purely mechanical device to work the action of the gun. instead of using the force from firing or a chain like the other guy said, that cylinder is acting like a... a worm gear to force things to move along its grooves as it turns.

    • 2 weeks ago
      Anonymous

      Overall mass: 173 kg (78 kg for the receiver, 60 kg for the barrel, and 35 kg for the feeder) plus 16 kg for the Gun Control Unit.
      Dimensions: 3,555 mm long (breech block is 431 mm wide and 465 mm high, barrel is 2700 mm long)

    • 2 weeks ago
      caius

      Tried to make a thread on it in april (

      [...]

      ) but that kinda went nowhere. Are there any videos of it cycling yet?

      • 2 weeks ago
        Anonymous

        Not yet. Now I think about it, the Ares EPG had a similar looking drum and crank assembly.

        • 2 weeks ago
          caius

          Maybe we'll get some more info from eurosatory in a couple weeks. The italian outlet RID teased updates but I didn't follow up
          >https://www.rid.it/shownews/6486/nuove-mitragliere-da-20-e-30-mm-da-leonardo
          >Further details on Risk&Strategy WEEKLY 15/24 out on Friday 26 April and on RID 6/24.

          >Ares EPG
          Still being developed or spun off into anything new? Been meaning to look into them / the question of their continued existence as a contractor at some point, but I haven't gotten around to it.

          • 2 weeks ago
            Anonymous

            Ares may have been used as the gun for a nuclear security RWS at one point, but I don't know.

            Why don't 30x113mm offer KE shells for ground vehicles? I know the pressure is mid and case capacity isn't huge but it should still be able to shoot a lighter weight dart or shell adquate for the case capacity. Ar they worried about sabots hitting tards or something?

            The HEDP already pens any BMP side and it's not intended to be a true anti-IFV weapon.

            • 2 weeks ago
              Anonymous

              Wasn't so much about penetration, against moving target a high velocity uses less time to reach the target.

            • 2 weeks ago
              caius

              >nuclear security RWS
              Oh, are they the ones with that spooky HL2/portal turret for high-security facilities?

    • 2 weeks ago
      Anonymous

      I wonder what sort of heat buildup and wear that has

    • 2 weeks ago
      Anonymous

      Hmm, Webley-Fosbery vibes.

  2. 2 weeks ago
    Anonymous

    Why don't 30x113mm offer KE shells for ground vehicles? I know the pressure is mid and case capacity isn't huge but it should still be able to shoot a lighter weight dart or shell adquate for the case capacity. Ar they worried about sabots hitting tards or something?

    • 2 weeks ago
      Anonymous

      Anything that has a 30mm mounted has better options in most cases

  3. 2 weeks ago
    Anonymous

    25x137 is pretty much an anemic grenade round. Projectile is too small for a useful HE payload, and the APFSDS has poor impact characteristics. Yes, I've seen the Bradley videos. It can get the job done, but practically any 30+mm round would be noticeably better in the same circumstances.
    I agree with you on 30x113.
    35x228 and 50x228 are the best overall. 35x228 already has vast infrastructure and would be the cheapest to manufacture.
    30x173 has pretty much no infrastructure, and it's likely being pushed by Rheinmetall because they own the rights to 30x173 AHEAD. Meanwhile 35x228 AHEAD is NATO domain and can be produced by any member state without a license. I don't understand why nobody recognizes Rheinmetall for the scumbag company they are.
    40mm CT has worse terminal ballistics than 35x228 and 50x228, which is probably why nobody wants it.

    • 2 weeks ago
      Anonymous

      The utility of 25 is that it’s incredibly effective while also having a huge amount of ammo that is able to be carried. Ammo capacity is very important.

    • 2 weeks ago
      Anonymous

      >but practically any 30+mm round would be noticeably better in the same circumstances.
      Anon, any analysis that doesn't include "ammo capacity" is fricking worthless. A big part of the job for general autocannons is roles that include raw volume of fire. Quantity is still a big deal.

    • 2 weeks ago
      Anonymous

      >. I don't understand why nobody recognizes Rheinmetall for the scumbag company they are.
      Wehraboos

      >40mm CT
      Barrel wear of a 125mm tank gun

      • 2 weeks ago
        Anonymous

        >barrel wear of a 125mm tank gun
        are there any hard sources for that, or is that just a speculation because how the round is made
        not mocking, just curious

      • 2 weeks ago
        Anonymous

        >barrel wear of a 125mm tank gun
        are there any hard sources for that, or is that just a speculation because how the round is made
        not mocking, just curious

        It's likely just moronic bullshit. CT cannons affect everything but the barrel since as soon as it's fired it is no different than any non-CT shell.

    • 2 weeks ago
      Anonymous

      >30x173 has pretty much no infrastructure
      The Bushmaster II shoots it, which is mounted on a whole bunch of things including CV90's built for Finland and Norway.

    • 2 weeks ago
      Anonymous

      >30x173 has pretty much no infrastructure, and it's likely being pushed by Rheinmetall because they own the rights to 30x173 AHEAD
      I think you are confusing at least 2 calibers and several manufacturers here

  4. 2 weeks ago
    Anonymous

    25 is good for general purpose. 30mm good for anti drone work. 50/35 good for anti drone and infantry behind cover.

  5. 2 weeks ago
    Anonymous

    Abloo

  6. 2 weeks ago
    Anonymous

    >30x113 straightwalled is a good candidate for replacing all RWS guns like .50BMG/Mk19
    Serious question: If the main objective is a relatively light gun for lobbing 30mm HE shells at the enemy, wouldn't the old kraut 30×90mm rebated rim cartridge (or something similar) be a legitimately good option?
    Sure, these things got shit ballistics, but the HE payload of each round is FRICKING HUGE compared to typical 30x113 shells and 40mm NATO grenades.
    And since it's a relatively low pressured cartridge, you could presumably build a fairly cheap and lightweight gun for this round.

    • 2 weeks ago
      Anonymous

      Might as well put on a 40mm grenade launcher at this point don't you think?

    • 2 weeks ago
      Anonymous

      This isnt 30mmx113, its a mine shell from ww2 german MK108

    • 2 weeks ago
      Anonymous

      It's not worth going back to IMO but it would have been based as an alternate history weapon for 1960s Russia.

  7. 2 weeks ago
    Anonymous

    bigger = better. a larger round can have a better ratio of HE to total mass. this is why praise for the 25mm is copium

    • 2 weeks ago
      Anonymous

      Larger warhead is inferior at targeting dispersed infantry.

      • 2 weeks ago
        Anonymous

        it's better because the blast radius of each shot is bigger

        • 2 weeks ago
          Anonymous

          Doesn’t matter with dispersed infantry, for that number of rounds carried makes the 25mm vastly superior

          • 2 weeks ago
            Anonymous

            25mm is worth less than its weight in 30mm
            see the HE volume to size ratio
            >but you can shoot just one round of 25mm and use less that way
            nobody does that

            • 2 weeks ago
              Anonymous

              Studies show 25 has more stowed kills than anything up to 35.
              >Figures from the US Army Research Laboratoy on investigating the adoption of a 35 mm gun on the Bradley come to the results pictured above: While a standard 35 mm point-detonating high explosive (HE) round has a higher lethality per round than a 25 mm HE round, the actually amount of stowed kills is considered to be worse at short to medium combat ranges, where the smaller fragmenting effect of the 25 mm HE round doesn't matter as much, because the accuracy is still very respectable.

  8. 2 weeks ago
    Anonymous

    50mm is the future

    • 2 weeks ago
      Anonymous

      At this point why won't you just have a discardable rocket pod with 50mm rockets. Spin stabilized unguided would be cheaper and guided could still be low cost enough with off the shelf electronics. Pi-like SBCs and Arduinos are pretty cheap and would be able to handle the control and any sensors on something like this. Might even be possible to use the rocket motor for electric and pneumatic power for control surfaces. A small turbine or 2 for siphoned gases would provide more than enough electric for such a small mission and siphoned gases could also be diverted to pneumatic actuators with gas regulators to prevent overpressure damage. Either way when the box-o-rockets is empty you can just dump it and pop a new one on the turret when the you get back to a garage or depot.

  9. 2 weeks ago
    Anonymous

    25 is the current best. In the future probably 50

  10. 2 weeks ago
    caius

    up

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