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Gatnerd@gatnerd·8m

6.8x51 NGSW Ballistics - .357 Energy at 1000yd The combination of the 80kpsi High Pressure Case with a Very Low Drag projectile results in impressive long range performance. While I think this is way too much for a standard issue rifle, it will be a tremendous LMG round.

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Gatnerd@gatnerd·11h

@D_E_Harris_Best Yes, thats certainly a possibility, likely even. A starting point might be a stretched version of the 4.6x30, designed around 5mm VLD projectiles. Would allow 40rd mags.

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D-E-Harris@D_E_Harris_Best·12h

@gatnerd Why not have it very slightly bottlenecked?

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Gatnerd@gatnerd·1d

Knox High Efficiency Cartridge = 5.56 Using High Pressure, they were able to duplicate 5.56 ballistics in a much smaller round, allowing for 50rd magazines and 30% less ammo weight. A much more interesting option than making legacy calibers more powerful.

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Gatnerd@gatnerd·11h

@deplorableson An NGSW fan I presume?

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A Listless Deplorable@deplorableson·12h

@gatnerd Wrong. We need barrier and armor penetration. Not more capacity.

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Gatnerd@gatnerd·11h

@Sterben1031

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Gatnerd@gatnerd·11h

@Sterben1031 Berger used to make a superb VLD 55gr .204, with a G7 BC of 0.182 (vs 0.152 for 62gr 5.56). Something like that but with the lead free steel tip EPR, is what I had in mind. grafs.com/catalog/produc…

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Gatnerd@gatnerd·11h

@David_13_x i've thought very similar but with 5.7x28, just a micro CIWS

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David@David_13_x·11h

I’m going to say it again. Downside the CRAM to .17HMR and put them on trucks

Gatnerd@gatnerd

Anti-Drone 5.56 NSWC Crane’s ‘Drone Killer Cartridge’, designed to break into 3 pieces to create a mini shotgun effect for better hit probability against drones. Range better than the previous saboted BB designs, at the expense of having less close range spread.

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Gatnerd@gatnerd·12h

@Sterben1031 Well, the Knox is just what we have as an example of "narrowmaxxing" for magazine capacity optimization. A more practical starting off point might be a cartridge based on the case head size of the 4.6x30, stretched to like x45, firing a 5mm VLD projectile while having 40rd mags.

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Ich Sterbe@Sterben1031·12h

@gatnerd Frankly I think straightwall cases are a horrible usage of the tech, bottleneck all the way with this stuff. While I don't find 5.7x28 very exciting, high pressure 224 Boz could be interesting, or even something akin to 22 Spitfire. Breaking 4k FPS could make SCHV real as well.

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Gatnerd@gatnerd·12h

@D_E_Harris_Best Up to me? A sort of SCAR/Ultimax 100 constant recoil assault rifle that could pair ultra controllable FA fire with the 50rd magazines and the oversize bolt of the SCAR.

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D-E-Harris@D_E_Harris_Best·12h

@gatnerd Right, but steel casings also come with their own issues. What sort of rifle is meant to run this round?

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Gatnerd@gatnerd·12h

@Helvegen29 No one wants to pay the cost to be the boss I suppose. Is anyone advertising DPICM cluster shells, now that they have returned post-Ukraine?

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Helvegen@Helvegen29·22h

155mm PFF is also yet to find a buyer

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Gatnerd@gatnerd·12h

@BrandonFDW Reminds me of the Suitcase Rifle from the movie "The Long Kiss Goodnight" (1996)

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FD@BrandonFDW·17h

B4 Armory CSS (Concealable Sniper System) is a breakdown sniper rifle designed for reduced signature or covert operations. It's currently being evaluated by a SOCOM unit and one of the largest Federal agencies special units (either CPB BORTAC, FBI HRT or BOP).

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Gatnerd@gatnerd·12h

@D_E_Harris_Best Probably not, just because we haven't really seen polymer regular cases be truly perfected even at regular pressures, much less the ~100kpsi this would run. But steel would be lighter then brass, and combined with the narrow case it would be very light.

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D-E-Harris@D_E_Harris_Best·12h

@gatnerd Can it be done with polymer cases, thus reducing weight further?

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Gatnerd@gatnerd·12h

@UberSoldat1025 That's my take as well, mag capacity is one of the few frontiers left.

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Cocktopus ✈️@UberSoldat1025·16h

Fitting more bullets in the same size magazine is one of the only places to improve modern small arms Other wise they’re light enough, reliable enough, accurate enough, lethal enough, that it’s not worth adopting any new system

Gatnerd@gatnerd

Knox High Efficiency Cartridge = 5.56 Using High Pressure, they were able to duplicate 5.56 ballistics in a much smaller round, allowing for 50rd magazines and 30% less ammo weight. A much more interesting option than making legacy calibers more powerful.

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Gatnerd@gatnerd·12h

@Sterben1031 I'm hoping to bring it back now that High Pressure Cases are coming online.

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Ich Sterbe@Sterben1031·18h

@gatnerd 2 decades later and 5.56 Knox is relevant again lol

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Gatnerd@gatnerd·12h

@KevinCasperWid @MarkSerbu Yes, I think the project failed in 2004 because they just had brass. By re-surfacing this old program, I'm hoping Federal/SIG/Shell Shock investigates this or similar mini cartridges using their new High Pressure Case tech.

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Kevin Widner@KevinCasperWid·13h

@MarkSerbu @gatnerd Looks to be a brass case, can't believe they would be getting the pressures seen in the stainless/brass hybrid cases or all stainless cases like Federal recently announced. Bet they could pump those numbers up if they did the testing again today.

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Gatnerd@gatnerd·12h

@MarkSerbu Sadly reports are scarce/may be lost to time, program was around 2004ish. Probably around 100kpsi if I had to guestimate. SIG has indicated its Hybrid cases can handle 125kpsi, and Federal's new PEAK likely similar. Hopefully they will experiment with mini cartridges like this.

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Mark Serbu@MarkSerbu·14h

@gatnerd Interesting! Chamber pressure?

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Gatnerd@gatnerd·15h

@sankohaindustry Small batch, cooked with love machining, plus chambering a novel magnum pdw cartridge. It's all the flex.

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San Koha Industries@sankohaindustry·22h

@gatnerd I remember a few years back Big Daddy Unlimited was pushing these so hard when they were still in buisness, and for that reason I never looked into them…but why are they so much money?

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Gatnerd@gatnerd·1d

Reason number 7.5 why I need to make more money

ScaarAT@ScaarAT

FK BRNO Field Pistol

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Gatnerd@gatnerd·15h

@MVargo6 That would be glorious. I had previously been thinking of a B&T MP9 type PDW in 7.5.

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MVargo@MVargo6·20h

@gatnerd Fun fact. 7.5 FK has no case taper which makes it a legitimate candidate if somone wanted to make a P90 that was chambered in a .30cal cartridge.

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Gatnerd@gatnerd·15h

@Eli74599 Awesome. How is firing 7.5 in real life, as fun as it looks?

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Eli@Eli74599·17h

@gatnerd I have the PSD and i love it. if i make enough money to buy the field pistol I'm openly flexing it

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Gatnerd@gatnerd·1d

@Tapas1776 Ukranians have tested this and found lead birdshot cannot reliably penetrate the carbon fiber and composite structure of modern drones reliably, which is why everyone is switching to tungsen BB's. The copper triplex rifle bullet, flying ~3x the speed of shotgunBB, will also work

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Tapas@Tapas1776·1d

@gatnerd Why not just a shell of cheap birdshot?

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Gatnerd@gatnerd·2d

Anti-Drone 5.56 NSWC Crane’s ‘Drone Killer Cartridge’, designed to break into 3 pieces to create a mini shotgun effect for better hit probability against drones. Range better than the previous saboted BB designs, at the expense of having less close range spread.

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Gatnerd@gatnerd·1d

@vbgamer17 @DoomerTapes Probably around 100 yards is where there would be enough spread to help statistical hit probability vs unitary, while still having some energy left with the subprojectiles. Just my gut take on it though, no data to support that.

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Vbgamer17@vbgamer17·1d

@gatnerd @DoomerTapes What are you calling short range?

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TheDoomerTapes@DoomerTapes·1d

Tell me why we shouldnt be running this in our belt feds as a general purpose round

Gatnerd@gatnerd

Anti-Drone 5.56 NSWC Crane’s ‘Drone Killer Cartridge’, designed to break into 3 pieces to create a mini shotgun effect for better hit probability against drones. Range better than the previous saboted BB designs, at the expense of having less close range spread.

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