Is this OSA factory ammo annealed?

[inventurkey]

osa-ammunition.jpg (137.26 KiB) Viewed 9970 times

Took the photo from the shooters mag on my phone so sorry for the s**ty quality but you can see what I mean.

Never seen this on factory ammo, is it annealing for better reloading their brass after?

[Chronos]

pretty much all brass is annealed at some point during the forming process. some might be more highy polished before loading than others but it's quite obvious on those cases though

Chronos

[Tiiger]

I think you'll find it's just other manufactures clean up the brass for sale where OSA haven't deemed it necessary.

It's only cosmetic though. Nothing to worry about.

[Pom]

Probably saves them a good penny in the manufacturing process not making it pretty too.

[vexesus]

It's only cosmetic though. Nothing to worry about.

Definitely an interesting look.

I reckon a few people might be put off not knowing what it is?

[BBJ]

Probably saves them a good penny in the manufacturing process not making it pretty too.

It would, buyer perception is important though as was mentioned above.

OSA will know what's the best balance for them but it wouldn't surprised me if a few people have gone with another brand just for piece of mind not understanding why the brass looked different. Even if there worry was unfounded.

Doubt the guy behind the counter will care (or know) to educate them. He'll just hand over the other box.

[bunnybuster]

Looks just like freshly unpacked mil ammo, brass possibly supplied by ADI?

Be Safe BB

[inventurkey]

I tried to find a bit more info but they don't seem to say much about it either way.

Just that's the way they do it without comment.

[tarnagulla]

Well, if it is "only cosmetic", their marketing experts have wasted time and money (they usually do...) I find brass is "prettier" when the annealing is obvious, and there is no doubt in the buyer's mind.

[Jack V]

It looks a bit over annealed to me but photo colour can vary wildly . One of the reasons they leave the colour on is to show the annealing was the last process.

[BBJ]

I find brass is "prettier" when the annealing is obvious, and there is no doubt in the buyer's mind.

That's a good point.

I thought of it as a negative as people not in the know might avoid it. Could be just as many more knowledgeable shooters who'd buy it for that reason.

[ghostwhowalks]

The OSA ammo is ADI brass even though its stamped OSA. Essentially the same ammo as the Aussie Outback ammo . Same supplier of brass , same projectiles , so would stand to reason its likely loaded with same powder also , I doubt that ADI / Thales would have a separate run of ammo / powder for OSA and Aussie Outback , though I could be wrong .

[Harper]

Judging buy appearances... You lot should know better

How does it shoot?!

[inventurkey]

Just looking, not shooting at this stage, Harp

[melanie]

Judging buy appearances... You lot should know better

That's how girls shop!

I'd try them

[Gwion]

Recently bought some of this OAS-ADI brass for 223rem.

First lot of new brass i have used (previously once fired factory Rem & Fed).

So far i like it. Primer seat nicely without much effort and seat evenly and flush for the 100 i have primed so far.

As for how they shoot?
This morning was the first round of load testing with BM8208, CCI SR 400 primer and Hornady Zmax 50gn bullets. The pic attached is one of the more promising charge weights that i plan to explore. Testing was at 100m and wind was changeable at about 10mph.

Cheers.

BM8208-test-02.jpg (153.05 KiB) Viewed 9477 times

[Elek]

So far i like it. Primer seat nicely without much effort and seat evenly and flush for the 100 i have primed so far.

Well you're getting better than I am with Remington brass.

One in 10 or so is noticeably off in one way or another. Not significantly or enough to cause any problem, but enough to notice.

[Gwion]

Elek. I found the same thing when reloading factory rounds from Rem. Surprised me how smooth the whole priming process went with the OSA.

Glad i decided to give it a go. Very affordable.

PS: in the interests of accuracy, there was 1 case in that 100 that was a little stiff to prime. Still better than my previous brass by a long way in this regard.

[Elek]

Good to know.

Think I'll try a bag next time some brass needs replacing.

[sneaker]

Same for mine with the primer pocket stuff.

I've been rotating the same 100 brass for a while now and will need to replace soon.

I'll give it a go too.

[Korkt]

Yep, it would be annealed as a straight tube before they put size the shoulder and neck

[Gwion]

After reloading and firing off about 100, I think I finally see what someone said earlier about it being over annealed. The 'burn' marks on the cases are obvious so my guess is it is annealed as a final stage in manufacture and they do seem to be further down the case than most people aim for when annealing a case but not a lot more than the ADI cases I've seen (being made by ADI I'm tipping there are the same, though).

Neck tensions do vary, though and the few I've had to pull seem to have stretched easily and I have now started neck sizing them all before loading from new. Getting decent results though, so still happy. Waiting to see results after they're all fire formed.

[melanie]

they do seem to be further down the case than most people aim for when annealing a case but not a lot more than the ADI cases I've seen (being made by ADI I'm tipping there are the same, though).

As longs as it's no where near the head it doesn't matter though, right?

It'll just harden up with firing then you anneal to the depth you want yourself, if you want to at all?

[Gwion]

From what I inderstand, Mel, you only want to anneal the neck and shoulder area or risk the case rupturing. The brass will harden with firing but if it is over annealed to may become too soft and again risk rupture.

No expert on the matter but that's how I understand it. There's a very helpful link somewhere in my library, I'll see if I can find it.

The OSA brass is fine, by the way. The brass is a bit softer than what I've seen in my limited experience but after neck sizing it loads up well.

[Gwion]

Here is that article mentioned earlier. Good info on the annealing process:

http://www.6mmbr.com/annealing.html

Cheers.

[melanie]

Thank-you muchly

[deye243]

The OSA ammo is ADI brass even though its stamped OSA. Essentially the same ammo as the Aussie Outback ammo . Same supplier of brass , same projectiles , so would stand to reason its likely loaded with same powder also , I doubt that ADI / Thales would have a separate run of ammo / powder for OSA and Aussie Outback , though I could be wrong .

this is exactly what i was told today at my local he has heaps of it at cop this $17 per 20 mate thats a bloody good price for something

with a premium pill in it .

[Bark]

The OSA ammo is ADI brass even though its stamped OSA. Essentially the same ammo as the Aussie Outback ammo . Same supplier of brass , same projectiles , so would stand to reason its likely loaded with same powder also , I doubt that ADI / Thales would have a separate run of ammo / powder for OSA and Aussie Outback , though I could be wrong .

AFAIK Aussie Outback ammo is ADI powder, but it's a blend that isn't available for retail purchase.

[not shore]

JUST ORDERED 308 BRASS $66 FOR 100 CHEAP . BY THE WAY LAPUA COME ANNEALED, 20 MIN IN THE TUMBLER WITH POLISH

[BBJ]

$66 for 100 Lapua?