CBC brass

[packetloss]

Ok, so CBC brass is known to be thicker than most brass and almost always fails to case gauge after reloading (SAAMI minimum). Ok so how is it that the factory loaded rounds case gauge just fine with that brass? If the total width is determined by the width of the bullet + the case wall if they can load them with a standard 9mm .355 fmj bullet any reload with the same diameter should work as well. Do the case walls get thicker after firing a factory round?

If I reload a CBC case, there is a visible bulge in the case wall where the bullet gets seated. None of them ever case gauge to SAAMI minimum specs. I've tested CBC factory ammo and it does case gauge to SAAMI minimum.

Needless to day, I don't normally reload any CBC brass, but one or two will occasionally sneak in.

 

[BC17A]

Measure a Magtech (CBC case)bullet and you may be surprised. I've measured more than one brand of factory ammo and have seen bullets as small as .3535".

 

[GeoDudeFlorida]

Measure a Magtech bullet and you may be surprised. I've measured more than one brand of factory ammo and have seen bullets as small as .3535".

Fiocchi .357 Magnum 142gr. FMJTC are .3565" and have an exposed base. I have used them in 9mm, .38Spl, .357Magnum and .38S&W with equally good results.

And I reload all of my CBC 9mm brass but I separate it and use them with 109gr. LTC bullets.

 

[AJC1]

I dont follow as I load 9mm and 45acp cbc brass. It's hard as hell and the 9 sucks to size but they all load shoot and cycle just fine. I'm also shooting 357mag cases so I'm not following.

 

[CQB45ACP]

I didn’t know CBC had different characteristics. (So now I have one more thing to worry about—better check flash hole size too.)

I load CBC in 45ACP and just include them in my general “mixed” headstamp category as I sort. So I load them interchangeably along with A USA, GFL, Aguila, FC, Fiocchi, PPU, Magtech, Maxxtech and haven’t noticed a difference.

 

[runner3264]

I load them and they are usually thicker by around .002 than other cases. I wouldn't worry about it as long as they chamber in your barrel. Do the barrel plunk test. If they punk in then you're good to go, which I'm sure they will.

 

[AJC1]

I didn’t know CBC had different characteristics. (So now I have one more thing to worry about—better check flash hole size too.)

I load CBC in 45ACP and just include them in my general “mixed” headstamp category as I sort. So I load them interchangeably along with A USA, GFL, Aguila, FC, Fiocchi, PPU, Magtech, Maxxtech and haven’t noticed a difference.

Cbc and s+b are both a lot harder to size in 9mm than all other cases I have experienced. Some brands seem to be regional favorites so I'm positive I havent used them all. Both of those brands seem to be value brands in my area.

 

[CQB45ACP]

Cbc and s+b are both a lot harder to size in 9mm than all other cases I have experienced. Some brands seem to be regional favorites so I'm positive I havent used them all. Both of those brands seem to be value brands in my area.

I have noticed S&B was different and I get so many of them I load them separately.

 

[The Glockodile]

CBC brass in .308 Winchester tends to spring back to more bloated dimensions every now and then, requiring multiple passes through the FL sizing die, even with annealing (tried multiple “burns” as well).

I sometimes wonder how people get them to work through progressives.

 

[Bcwitt]

Not sure as I have not tested it, I would guess it has a high zinc content. High zinc (k?) Alloys have more memory & want to spring back the way it was.

 

[Charlie98]

So I load them interchangeably along with A USA, GFL, Aguila, FC, Fiocchi, PPU, Magtech, Maxxtech and haven’t noticed a difference.

Oddly enough, out of all those headstamps, I only keep the FC and maybe the PPU... all the rest of it, including CBC, gets scrapped.

CBC brass in .308 Winchester tends to spring back to more bloated dimensions every now and then, requiring multiple passes through the FL sizing die

The one lot of CBC brass I have is 100 .308 cases from some M80 ammos I bought during the First Dark Age. It's heavy, for sure... so I've relegated it to low-power cast bullet loads in my Savage 99. I don't want to have to fight the sizer after it comes out of the M1a...

 

[CQB45ACP]

Oddly enough, out of all those headstamps, I only keep the FC and maybe the PPU... all the rest of it, including CBC, gets scrapped.

I scrap nothing unless it’s damaged.

 

[armoredman]

Been using CBC brass for quite a while without issue. AMERC gets scrapped without hesitation.

 

[lordpaxman]

If I reload a CBC case, there is a visible bulge in the case wall where the bullet gets seated. None of them ever case gauge to SAAMI minimum specs

I reload mixed Hs as well, and notice most of the reloads that don’t fit the gauge are CBC brass. This is in 9mm with a 147gr .356 pc bullet at 1.120”. What I haven’t checked is if it’s all the CBC or just some, next time I’ll try to pay attention. This is with standard Dillon dies, and I was toying with the idea of running them through my Lee FCD just to see what it does. While they don’t gauge as is, they do fit the chamber so they go in the live fire practice rounds box. Good luck.

 

[Ironicaintit]

I have quite a few of them in 9mm Luger and haven't had a problem. (With 124gr XTP @ 1.100) They do have nice neck tension, which I'm a stickler about.

 

[Rule3]

I am still using CBC brass that I saved from years ago when I bought ammunition.

It's the bestest brass ever made!

 

[Metal God]

When I clicked on this link I thought I knew exactly what it was going to be about and was ready to give my $.02 . I was ready to talk about how I have found that CBC 223/5.56 brass has quite a bit less case volume then any other cases I've loaded . I was ready to talk about how when loading mixed 223 brass every once and awhile the powder would fill the case substantially more then all the other cases , almost to the point of overflow . At first I thought there was something left in the case but that wasn't it so I put that case aside . It then happened again and again and at that point I looked to see what head stamp they were , yep all CBC . I found this very interesting and decided to load them up with that same charge that almost overflowed the cases and seat the bullet . I then went to the range and shot them and compared over a chrono the difference . The CBC cases averaged 96fps higher velocities then all the other cases . Needless to say I don't use those cases in 223 any more and they are set aside for when the zombie's come .

So imagine my surprise when this thread was about 9mm cases ???? Never did I think that CBC cases across the board were thicker resulting in less case volume in what appears to be all the cartridges they make brass for

 

[bullseye308]

Specifically about 9mm, I load mixed brass all the time. I only cull amerc, splits, maxxtek with the shelf, and berdan primed. I notice CBC and S&B when priming and sizing, but they are not bad enough to cull them. Maybe I’ll set them aside for specific loads the next time they come through the press. I set my 1911 barrel by the press as it is my tightest chamber and if it fits it ships. The few that don’t fit get factory crimped and set aside for the Glock as warmup rounds.

 

[CQB45ACP]

When I clicked on this link I thought I knew exactly what it was going to be about and was ready to give my $.02 . I was ready to talk about how I have found that CBC 223/5.56 brass has quite a bit less case volume then any other cases I've loaded . I was ready to talk about how when loading mixed 223 brass every once and awhile the powder would fill the case substantially more then all the other cases , almost to the point of overflow . At first I thought there was something left in the case but that wasn't it so I put that case aside . It then happened again and again and at that point I looked to see what head stamp they were , yep all CBC . I found this very interesting and decided to load them up with that same charge that almost overflowed the cases and seat the bullet . I then went to the range and shot them and compared over a chrono the difference . The CBC cases averaged 96fps higher velocities then all the other cases . Needless to say I don't use those cases in 223 any more and they are set aside for when the zombie's come .

So imagine my surprise when this thread was about 9mm cases ???? Never did I think that CBC cases across the board were thicker resulting in less case volume in what appears to be all the cartridges they make brass for

As every good public affairs adviser says, answer the question they should’ve asked.

 

[gifbohane]

AMERC gets scrapped without hesitation.

I have only seen 2 or 3 of these AMERCs in the last five years. Think (or hope) they are all out of circulation.

 

[packetloss]

Interesting that no one has had enough issues with CBC to cull them. When I was mostly shooting my Sigs, I didn't really have any issues. Pretty much all my CBC would plunk in my Sig barrels even if it failed in a Dillon Case gauge. Once I started shooting my CZ more, I had a few that wouldn't go into battery. All of them were CBC. I started case gauging everything in a Shockbottle and noticed all the ones that failed were CBC. The Shockbottle is SAAMI minimum. The Dillon I believe is SAAMI max. Typically if it gauges in the Dillon it will work in my CZ. I do find that S&B is thicker than Win/Blazer and FC but not as much as CBC. Almost all the S&B I reload will case gauge in my Shockbottle.

Since I do use my reloads in multiple guns, I find it best to reload to the minimum denominator just to make sure it will work in everything.

 

[Phidelt208]

I've had the same experience that a lot of other reloaders seem to have. When it comes to 9mm I scrap CBC brass I never pick it up I have way way more rounds that don't gauge with CBC brass. Why waste the time on them, especially if you're a high-volume reloader.

 

[243winxb]

CIP cartridge/chamber standards may apply to CPC from Brazil? Different? View attachment 1028247 Case walls are thicker on CBC, when compared to Win & Federal.

Edit, add , drawing diameters are same as saami.

 

[Bfh_auto]

I primarily shoot CBC in 38 and 357. It works fine in them. My experience with 223 is it's similar in case capacity to PMC so they get thrown together and receive .2 gr less powder from my accuracy node to get the same velocity. Granted the charge differential would change based off powder used.
I primarily keep them for I'm not picking up my brass purposes.

 

[CQB45ACP]

I know 45ACP CBC cases are NOT the primary issue here, but I’ve just separated 23 of them from about 150 other “mixed” headstamp cases. These are cleaned, sized, and all very freely drop in and out of my Hornady case gauge.

That’s all I have unloaded (no way to easily find loaded ones) and am willing to run an experiment loading them if it’ll inform this discussion. Or I’ll try to measure something for you as well.

Let me know.