Thread 64422780

So does 7.5 FK at least use a somewhat common projectile size? Or even if you reload youre still forking over a pretty penny

Wikipedia says the bullet diameter is 0.307”. Can .308 bullets work or does that 0.001” make a difference?

>>64422904
no and you'd have OAL issues. you really want handgun style bullets, but they aren't widely available in .307/7.5mm

>>64422780 (OP)
It was always a cool round but it missed its window, they killed any hope it had by keeping it proprietary. Nobody is interested in proprietary rounds at this point, and particularly not in a handgun round where there isn't that much envelope to work with. And yeah even to reload it's not gonna be cheap, maybe if home CNC ever gets good enough and cheap enough you can just pump out your own copper with arbitrary dimensions.

>>64422919
.001" is meaningless. Any .30 pistol bullet will work.

>>64422919
>OAL issues.

What? .307/.308 is bullet diameter. Has nothing to do with length. Though you probably couldn’t load any off the shelf .308 bullets into this - they aren’t stubby enough - diameter-wise, it’s probably not an issue. Although I know Hornady makes a .30 cal bullet that’s like 0.7” long. That might work.

>>64422998
sure why not
>>64423024
>Has nothing to do with length.
>they aren’t stubby enough
??????

would .30 carbine bullets work?

>>64423024
>What? .307/.308 is bullet diameter. Has nothing to do with length.
Are you retarded? Like 99.99% of 30cal usage is rifle rounds. If you go looking for 30cal bullets to load there are a bajillion rifle options covering the whole spectrum because it's so popular, but zero of them are going to work for 7.5 FK duh. Other anon and OP obviously are talking about the practical reality of "how easily & cheaply can I just go buy a thousand bullets to load".

>>64422941
I don't understand why they didn't make a PCC/subgun for this round. Not even a prototype, just the original all-metal gucci pistol and the PSD line. It seems like a good idea to at least try for a round like this. But then again maybe I'm retarded and this round has diminishing returns from an extendrd barrel.

>>64422919
Also a .30 Carbine bullet definitely will not work.

>>64422919
I don't know if it's any different with handgun bullets but the nominally .307 7.5 Swiss can be reloaded with .308 bullets and it works fine

>>64423080
Pistol bullets are commonly oversized.

>>64423064
I mean, I don't understand why they though keeping it proprietary would turn into some goldmine long term. In the 80s or 90s I guess one could still sorta squint and imagine they might bribe their way to getting picked by NATO and then print money for a decade or two but 7.5 FK started getting produced in what, 2013? 2014? They could have done fine with first mover advantage and caught a huge gun buying wave and people interested in trying something like that but too late now. As you say they could have done some other products too, or partnered with other PCC/SMG players to have 7.5 FK chamberings.

I suppose hardly the first time something a little interesting has gotten killed by dumb corp decisions tho.

>>64423034
educate my negro. these fools need it. I'm not a reloader myself but if you can, educate.

>>64423064
Indeed. They even sell a detachable stock for it, but I guess they're really into the VIP protection gun idea. Or maybe they aren't making enough revenue to take risks.
>But then again maybe I'm retarded and this round has diminishing returns from an extendrd barrel.
I don't think so. Even .22 TCM gets all the way up to 2800fps from rifle length barrels. 7.5 FK can probably get 7.92 Kurz performance from a 10-in barrel.
>>64423109
It was revealed to me in a dream that one of the reasons they may be keeping it proprietary is to avoid underpowered loads becoming the de facto standard like 10mm Auto, so they're controlling production for a while to set a baseline for what the round is capable of and what it should be.

>>64422904
.30 Luger bullets mic .308, at least Sierra's do. Might work. Might blow up.

>>64423199
>It was revealed to me in a dream that one of the reasons they may be keeping it proprietary is to avoid underpowered loads becoming the de facto standard like 10mm Auto, so they're controlling production for a while to set a baseline for what the round is capable of and what it should be.
I could see that sorta reasoning, I know inventors who have thought that way and some control-freak/possessive qualities often go with the territory. But it's still dumb. End of the day you just can't control an ultra competitive market like that, and particularly for handgun rounds mass support is really vital to break through and be anything other than a novelty/historical footnote. And 2014-2024 they had an unusual window of ultra easy money and exploding gun ownership with people willing to splurge and try out new stuff. And for LEAs too to some degree. Now we're looking at a lot of headwinds and not just people but LEAs/militaries getting more conservative, all while the importance of small arms themselves seems to be on a downward trend.

I guess 7.5 FK will lose IP protection somewhere between 2029 and 2034 but honestly I'd be kinda surprised if it goes anywhere at this point. It's hard for new rounds to make it anyway but I think they lost a one-time chance.

>>64423034
>>64423049
Are you retards incapable of separating caliber from length? These are 2 different measurements. Did you know that?

I went on wikipedia, saw that bullet diameter is .307, and though “huh, that’s curious” and came here to ask if a 0.001” makes a difference. I am fully aware that normal 308 bullets would be too long to load in a 7.5FK, but they are not too wide. Fuck, you guys are retarded.

>>64423255
>might work, might blow up.
Oh good, that puts my mind at ease. Reminds me of the war dogs scene, where they’re driving through Fallujah.
>”So how dangerous is this?”.
>”Eh, 50/50.”

>>64423297
OK so the problem here is that you're a retarded turboautist who doesn't reload.
>Are you retards incapable of separating caliber from length?
Diameter and length go together in this case for the actual for real market that actually exists you stupid faggot. Obviously in principle you can do any diameter with whatever, there are endless examples and we all know it. But when the questions are
>does 7.5 FK at least use a somewhat common projectile size?
>Can .308 bullets work or does that 0.001” make a difference?
what that MEANS is "can I just go to whatever reload supply place and buy a bunch of bullets in bulk cheap off the shelf, because I know that '30cal' is super popular" and the answer here is no due to OAL. Rifle COAL targeted 30cal bullets are indeed popular and widely available but pistol COAL are not.

>>64423297
I don't reload but I think it should be fine. .308 Win is loaded with bullets all the way from .307 to .309 depending on whether they're jacketed or not and other factors. I guess it's down to the FK BRNO's bore, but it's very unlikely to have accuracy issues or anything let alone blow up.
>>64423377
You're the reloader here but I find that hard to believe. There has to be a market for .30 carbine and 30-30 bullets and 7.5 is designed for fairly long projectiles anyway, they're only light because they're monolithics.

>>64423429
I was gonna say, yeah 7.5FK uses bullets pretty long for its case. That middle bullet has a ~2.74:1 L:D, or about 0.84”. The 110gr vmax is 0.92”. 30 carbine bullets are under 0.7” or so.

>>64423075
See >>64423429 >>64423583
7.5 FK is a carbine round in a handgun cartridge's body

>>64426819
Slightly longer OAL than 7.62 tokarev which is a pretty long handgun round

Could 30 super carry rounds work for reloading?

>>64426869
>.312 for .307
I say- i say thats a mighty big gap pluggin that there barrel my boy. Might be able to ream it down or something though

>>64422780 (OP)
9x25 mogs this shitty meme round

>>64423024
>>64423297
>What? .307/.308 is bullet diameter. Has nothing to do with length.
>Though you probably couldn’t load any off the shelf .308 bullets into this - they aren’t stubby enough
Holy fuck you're dumb.

>>64426869
you'd have to swage them down, and don't forget about 30 carbine bullets

I'm wondering why someone hasn't just made a similar cartridge with 10mm brass and standard .32 bullets or something.

>>64428294
You're describing 9x25mm Dillon. I think 7.5 FK's "thing" is the higher pressure, around 50,000 PSI CIP, which is probably why its case is so thick. It's like a bigger and hotter .22 TCM. I think the best way about it is a shortened .30 Rem/6.8 SPC case for around 22-25 gr H2O capacity and necked down to .224 with an Ackley or .224 Boz-style shoulder, and 5.56x24mm-style neck dimensions for projectile commonality. With a fast powder around 50kpsi it should be pretty awesome. You could get some decently heavy projectiles in there too if you make it long enough.

>>64429732
>You're describing 9x25mm Dillon
No, I'm not. 9x25 doesn't use .32 bullets.

>>64429800
Sure, but it's a .045 inch difference, and 9x25 Dillon is decently well supported so it's hard to justify it unless you're sitting on a hoard of .312 bullets

>>64430422
Yeah, but I'm just surprised someone didn't try to make a 7.5FK equivalent with commonly available components and a non-proprietary cartridge design.

Retard here. How does 22 TCM/9R (.370" rim) work in 9mm breechfaces (.392")? Is the extractor groove just unsupported? Shouldn't it fall off the extractor during secondary extraction?

>>64430464
look at the title on the image you posted, silly. that's a diagram for 22 tcm, not 22tcm/9r

>>64430662
The difference is OAL and shoulder, not case head, as far as I can tell. .22TCM was designed to fit in .38 Super 1911 magazines and .22TCM9R is a modification to allow it to fit in polymer double stack 9x19 magazines. You can still shoot .22tcm9R from regular .22TCM barrels, so 9R can’t have wildly different case head dimensions.
>>64430464
AFAIK, it is just unsupported in the extractor groove, but most extractors have enough travel (in order to put enough load on the spring) that it’ll be in enough contact for secondary extraction despite the difference. The primary extraction of the TCM cartridges is quite good anyhow.

>>64429732
>I think the best way about it is a shortened .30 Rem/6.8 SPC case
That's what 10mm is though.

>>64430443
Why would anyone bother? What does this retarded meme cartridge offer that the hundreds of existing retarded meme cartridges don't?

>>64431321
18" .30 carbine performance from a 5.2" barrel.

>>64431321
Because it would be fucking neat.

>>64431321
It looks cool and pointy with a nice shape. Looking good makes a cartridge perform better everyone knows that anon.

>>64431420
100%. Troof. And a black tip adds 10% muzzle energy, in the same way that flames on a car add 100hp

>>64430964
I had no idea. I guess if you can't find thicker 10mm brass that takes small primers to neck down, you can do the shortened .30 Rem case thing and run it out of rebarreled 10mm guns.

>>64428294
That's literally 9mm dillon.

>>64435703
>.355 bullet is literally a .32 bullet
nigger wat