300 Win Mag need help in Identifying the brass, Im confused...

[orisolo]

Hi Guys,
We got 300 Win Mag brass from he range.
While sorting the brass out we realize that we have 1 headstamp with to completely different shells.
Im not sure anymore which one is the 300 win mag and which one isn't.
Also the one the is not do you know what is it?
I appreciate the help.
Thanks
87512
87513

[btroj]

Someone fired 300 Win mag in a 300 Weatherby. I have a just like that. Picked em up a few years back at the range.

Guy buys a 300 mag, buys 300 mag ammo, it goes bang.

Scary

[orisolo]

Thats should be scary so the brass to the left was fire form inside a barrel.
Thats a lot of forming the neck is up by probably a 1/4"

is the brass on the left is still usable? Should i trash it?

[btroj]

No, the one on the right is messed up.

One on left looks like a normal old 300 win mag.

300 Weatherby has shoulder moved forward, it is made on a longer case. That is why one on right has basically no neck. Case is far shorter than chamber was.

[454PB]

btroj is right on. I know a guy that did just the opposite......fired a .300 Weatherby magnum in a .300 Winchester magnum. It cost him most of his sight. You wouldn't think it would even chamber....but it did. The gun kaboomed and damaged both of his eyes. Surgery, contact lenses, and glasses gave him about 25% of his vision back.

[orisolo]

Wow, You would think that pushing a round that much longer wouldn't be ez.
how did he chambered the gun with a hammer?

Lucky he survived it.

[orisolo]

Yes, I agree keep the one on the left.
My bad, the one on the right doesn't have a neck anymore.
I wonder if the brass is still good or should be trashed?

If the brass on the right is pressed in a sizing die would it be "fixed"
( I have only a few of these bad ones so its not about "saving" but more asking for the community)

[starmac]

I have a friend that bought a new 300 win mag this year. He wanted a 45/70 guide gun, but the salesman talked him into the 300, because he claimed he wouldn't be able to find ammo for the 45/70. It took him a month to find win mag shells, and in the meantime he bought a box of 300 whetherby mag, those didn't fit. Then bought a box of 300 short mag, no fit either, before he finally found the right shells. He would up with over 150 bucks in 20 rounds that could be used in his gun. lol

[orisolo]

Yes the 300's is really confusing.
We currently have 4 boxes for the 300 family and wonder if we will have more.
So far i know of 300 Win Mag, 300 weatherby, 300 win mag Ultra and 300 WSM.
Now i need to make a new box for 300 win mag fire formed to 300 weatherby ;(
so very confusing to us when sorting.

[Alvarez Kelly]

Yes the 300's is really confusing.
We currently have 4 boxes for the 300 family and wonder if we will have more.
So far i know of 300 Win Mag, 300 weatherby, 300 win mag Ultra and 300 WSM.
Now i need to make a new box for 300 win mag fire formed to 300 weatherby ;(
so very confusing to us when sorting.

No. You don't need to make a new box for fire formed brass. You need to throw it in the scrap bucket. It's now just scrap brass. It's not safe to reload, at least in my opinion.

[Three44s]

The only thing that brass might be alright for would be to shorten down for 350 Rem or 6.5 Rem magnum cases.

You'd have to section a couple and see if they thinned out just ahead of the web. If not I think they would be safe for that excercise.

Best regards

Three 44s

[lylejb]

Now i need to make a new box for 300 win mag fire formed to 300 weatherby ;(

No, you need to make a new box for foolish things found on the range. I can add a few 40-45's to the box for you. A 40s&w fired in a 45 chamber. Sort of a reverse bottle neck:veryconfu

[Bloodman14]

Brass is cheap in comparison to your sight; scrap 'em.

[fouronesix]

Yes, the "300 Mag" nomenclature has been problematic. There is old 300 H&H brass out there that's simply headstamped "300". There are Weatherby rifles out there also marked with incomplete nomenclature. Have to really watch the 300s.

[ShooterAZ]

Not only do you have to watch the 300's, ya gotta watch the 30's too. A friend of mine shoved a clip full of 308 Win into his Garand and went through the entire clip. The fired cases ejected looking like 45-70 cases....Amazing.

[btroj]

It shouldntbe a problem!

[blackthorn]

I don't see why reforming it back to 300 Winchester mag would be any more dangerous than forming any other brass down to a different size. The caution to check for the "it's gonna seperate" ring is spot on. Years ago I bought a 300 Weatherby and the ammunition was a dollar each (that was when 30-06 went for under $8 a box). I got some 300 H&H and used them to hunt deer, then reloaded them to 300 Weatherby. Worked fine! Still have some of them that are on thier fith reload. The only thing is they are slightly less in available powder space so they get a couple of grains less powder.

[starmac]

Downright sceery.....

[Love Life]

The 300's are not confusing at all. Read your barrrel, read the ammo box and head stamp, and it is not confusing at all.

The 300's are not confusing, some people are just a bit slow if you catch my drift.

Scrap them.

[starmac]

Not long after I bought my old M14 rem pump and before I got any brass and dies, I just happened to see 30 rem ammo at sportsmans. I grabbed 4 boxes and was glad to get it. lol When I got home I opened a box and was I surprised, looked back at the box and it was 30 rem ar, I don't know what that stuff fits, but the ammo went back anyway. lol

A friend of mine that lives a few miles out of town, had his girlfriend pick him up some 270 ammo, she brought him some 270 short mag ammo, soooo he just bought a rifle to fit the ammo later. lol

[paul h]

Looks like 300 Weatherby cases after a Bris ;)

There is nothing unsafe about firing 300 win mags in a 300 Weatherby. The belt takes care of the headspacing, and the increased chamber volume will reduce pressure. Accuracy might suffer a bit due to the long jump to the lands, that's about it. No different than fireforming brass in a wildcat chamber. The only difference is the shortened neck.

A dab of imperial sizing die wax and a trip through the fl sizing die should have you back in action. Not something I'd make a habit of doing, but not something that is impossible to fix.

[fouronesix]

The 300's are not confusing at all. Read your barrrel, read the ammo box and head stamp, and it is not confusing at all.

The 300's are not confusing, some people are just a bit slow if you catch my drift.

Scrap them.

I catch the drift, however the 300s have been all over the place as far as correctly matching what's marked on the barrel and what's marked on the headstamp. That's the problem. Not the same as putting a 308 into a 270.

For example: this is on a real factory rifle that is not that old either-- the factory barrel stamp says "300 Magnum". Now you tell me which is the correct cartridge???? 300 H&H, 300 WM, 300 WSM, 300 WBY, 300 RUM????

It pays to make sure- I'll go with 454PB's caution and example.

Brass is cheap compared to other things. When in doubt, just scrap them, get new brass with the correct headstamp and was originally made to fit the chamber of the gun in question.

[nicholst55]

On a related note, I see a lot of .357 Sig ammo for sale that people grabbed when they really wanted .357 Mag ammo.

[knifemaker]

I would not resize that case to the original 300 win. mag and use it for further firing. You can bet that it has streached forward enough to have thinned the case walls just in front of the belt. Resizing and firing again is a good chance of having a case seperation in your rifle chamber. Just not worth the pennies you may save by not throwing it away.

[btroj]

I catch the drift, however the 300s have been all over the place as far as correctly matching what's marked on the barrel and what's marked on the headstamp. That's the problem. Not the same as putting a 308 into a 270.

For example: this is on a real factory rifle that is not that old either-- the factory barrel stamp says "300 Magnum". Now you tell me which is the correct cartridge???? 300 H&H, 300 WM, 300 WSM, 300 WBY, 300 RUM????

It pays to make sure- I'll go with 454PB's caution and example.

Brass is cheap compared to other things. When in doubt, just scrap them, get new brass with the correct headstamp and was originally made to fit the chamber of the gun in question.

It is the responsibility of the person shooting to always ensure the right ammo goes in the gun. Always. Basic hunter safety classiest each this every year.

Could it be confusing to figure out what a 300 mag marked rifle is chambered for? Yep. Buy that rifle then you figure out what it is before buying ammo.

Anyone who buys a 300 mag marked rifle and assumes that any 300 mag ammo will fit is not a person I care to hunt or shoot with.

If you aren't going to take the time to learn enough to ensure you have the right ammo then don't buy a gun.