5.7 x 28

[itchyTF]

Anybody loading this cartridge? I come across brass every once in a while.

Necking down to .20 or even .17 might be interesting.

 

[JB10]

From what i read its a delicate process. My brother in law keeps all his that he shoots, just not tried to load yet for it.

 

[Paul's Black Rifles]

Anybody loading this cartridge? I come across brass every once in a while.

Necking down to .20 or even .17 might be interesting.

A 5.7x28 necked down to 17 would be a little faster than the 17 WSM. It would be interesting.
I've heard you don't want to clean the cases, they are coated to help with extraction. But boy they are tiny, couldn't be easy to reload.

 

[matthias]

They are not that bad to reload. I dont think 5.7 is worse than the hornet. And the coating isn't really an issue. The 17 and 20 variations are quite the project. Very fun stuff.

The biggest issue is making sure you have powder charges very carefully weighed out. There is little room for error.

 

[Paul's Black Rifles]

They are not that bad to reload. I dont think 5.7 is worse than the hornet. And the coating isn't really an issue. The 17 and 20 variations are quite the project. Very fun stuff.

The biggest issue is making sure you have powder charges very carefully weighed out. There is little room for error.

I have not reload either the 5.7 or the Hornet, so I only surmised difficulty reloading the small cartridge.
I agree powder charges need to be more accurately measured in such a small case. Maybe I will buy one someday and start reloading 5.7.

For now I'll stick with the 221 Fireball!

 

[ASbobcat]

A 5.7x28 necked down to 17 would be a little faster than the 17 WSM. It would be interesting.
I've heard you don't want to clean the cases, they are coated to help with extraction. But boy they are tiny, couldn't be easy to reload.

If you want a necked down 5.7x28, take a look at 4.6x30 HK. Ammo is available, but reloading would be a problem (.18cal bullets) until it catches on.

 

[L.Sherm]

Theres been some people on saubier who have done it, I cant remember for sure but I think decent brass was the issue.

 

[matthias]

17 and 20 velociraptor I think we're the names

As far as brass goes , its alot like the real old days we have all heard about. Buy or find a large pile of brass and sort , then sort , and finally sort. Then you have some brass that is a good starting point.

I do not load for semi autos. They destroy brass by blowing the shoulder forward. Other than size its like any other rifle round.

 

[B23]

A 5.7x28 necked down to .17 cal would be very similar in performance to the 17 Hornet since they have nearly the same case capacity and not that 17 Hornet brass is great but the brass for the FN five seven cartridge is just so damn thin. I'd imagine great care and doing it in multiple steps, when necking the 5.7 down, would need to be taken or you'd likely collapse the shoulder.

I have a FN five seven pistol and it's a pretty cool little cartridge but the brass is very thin stuff. It's to bad the brass isn't better because it could be a great replacement for the 17 Hornet and it's not a rimmed case, like the Hornet is, so feeding would be better.

Not sure what the brass is like for the 4.6x30HK, I know it has a higher max pressure, but if it's less quirky as well as it runs at a higher pressure it could be a better choice to wildcat. I just don't know how available, if at all, new unfired brass is for the 4.6x30HK I've only ever seen it in loaded ammo.

 

[Benchrest Braxton]

I went down this road in my head a few times, I think for smallest practical applications for reloading, 221 fireball and necking it down if you want smaller bullets.

the parent case is 300 blackout so brass options are endless

 

[itchyTF]

I thought the parent case of the blackout is the .223.

 

[L.Sherm]

I thought the parent case of the blackout is the .223.

I think you can make 300BO from fireball brass also both are 223 parent case.

 

[B23]

I thought the parent case of the blackout is the .223.

Technically speaking, you could say the 222 Rem is the parent case considering they all were offspring of the triple deuce.

 

[Benchrest Braxton]

I thought the parent case of the blackout is the .223.

Technically speaking, you could say the 222 Rem is the parent case considering they all were offspring of the triple deuce.

exactly, but look at this picture, then try and tell me again that the parent case of the 300 blackout is the 223 and not the 221 fb……

 

[L.Sherm]

exactly, but look at this picture, then try and tell me again that the parent case of the 300 blackout is the 223 and not the 221 fb……

I can make any fireball, 20VT or 300BO case out of 223 so why not is the 223 a parent case?

 

[matthias]

300 whisper was made from 221 fireball. Just ask jd Jones. Then ask where the blackout came from.

 

[L.Sherm]

I make 17 badger brass from straight wall 30 carbine so is the 30 carbine the parent case?
I think some got the " parent" case definition different.
Its the same thing as being able to make the 26,28and 30 Nosler brass from RUM cases.

 

[itchyTF]

The Whisper and BO look exactly the same. Why are there 2?

 

[Jeff]

The Whisper and BO look exactly the same. Why are there 2?

The 221 came from the 222

 

[JohnW...ski]

Here you go, .14/221 Eichelberger, .17 Mk 4, .20 Vartarg, .221 Fireball, .30 Blackout. The first four were made using .221 Fireball brass, the .300 used .223 brass but .221 would also work.