Fire Forming 300 Win Mag Brass For Plinking Use In 300 Weatherby. Yea or Nay and Why?

[arakboss]

I realize you would end up with a relatively short neck on the fire formed brass. But would it have enough neck tension to hold the projectile for manually feeding each cartridge into the chamber? I have seen photos of the brass after firing a 300 Win Mag cartridge in a 300WBY chamber and it often results in split shoulders. My thought is that by fire forming it with cream of wheat style loads and freshly annealed necks that it might help prevent the split shoulders?

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[TTSX]

That's really stretching the brass... Can't imagine it's very thick and will hold up well to repeated firings. One way to find out, though

 

[orygun]

I'd think the neck tension would be horribly inconsistent and weak. Likely the primer would push the bullet out of the case before ignition.

Somewhere I have a case just like show. Took me a moment to figure out what happened. It was one person's mistake. No reason to make it 2 persons mistakes.

 

[TTSX]

The .357 SIG has even less of a neck to work with and it does just fine. Neck tension wouldn't be my primary concern, honestly. Besides, there are crimping dies.

 

[arakboss]

The .357 SIG has even less of a neck to work with and it does just fine. Neck tension wouldn't be my primary concern, honestly. Besides, there are crimping dies.

That 300 win mag neck reminded me of the 357 sig neck. There may not be enough tension to trust loading them in the magazine but maybe enough for hand feeding them.

 

[orygun]

That 300 win mag neck reminded me of the 357 sig neck. There may not be enough tension to trust loading them in the magazine but maybe enough for hand feeding them.

Almost like an old Schutzen rifle. Put the bullet in the bore, then load powder into the case and insert case in rifle.

Could be done, but what's the actual point? I know Weatherby brass is expensive, but time is valuable, too.

 

[TTSX]

Almost like an old Schutzen rifle. Put the bullet in the bore, then load powder into the case and insert case in rifle.

Could be done, but what's the actual point? I know Weatherby brass is expensive, but time is valuable, too.

The point is, there is no point. That's just the way arakboss is. He will spend literal hours to save $3

 

[Dozer99]

The belted magnum's are a whole different animal. Plus the shoulder angel is so much greater on a Weatherby that the WinMag brass would thin out too much I would think to be safe. So my vote is no!

 

[orygun]

The point is, there is no point. That's just the way arakboss is. He will spend literal hours to save $3

I think you're too generous! "hours to save $.03!" But he's keeping himself, and us, busy with all of these thoughts, so what's the harm?

 

[P7M13]

@arakboss, this is NOT one of your better ideas.

 

[arakboss]

https://www.larrywillis.com/caution.html

 

[orygun]

A former boss was quite the gun collector/hunter. One of his friends bought some 300 Win Mag ammo for his old Winchester. The Winchester Model 70 said 300 Magnum on the barrel, but this box of ammo wouldn't fit the chamber.
My boss graciously offered to trade him another Winchester that would chamber the 300 Win Mag ammo.

Yeah, I would trade a post 64 Winchester in 300 Win Mag for a Pre-64 in 300 H&H, too.

 

[Nosferatu]

I think it's time you stop mucking around with this mickey-mouse stuff and get into 50 BMG! I'm sure you could split 3 or 4 300WM cases and form them into a single 50 case! Imagine the savings!

 

[Spitpatch]

A textbook case of, "Just because you can, doesn't mean you should".

(Aside from the fact that "Plinking" and ".300 Weatherby" are mutually exclusive terms.)

 

[orygun]

(Aside from the fact that "Plinking" and ".300 Weatherby" are mutually exclusive terms.)

A case full of Trail Boss and a lead bullet?

 

[DirectDrive]

I realize you would end up with a relatively short neck on the fire formed brass. But would it have enough neck tension to hold the projectile for manually feeding each cartridge into the chamber? I have seen photos of the brass after firing a 300 Win Mag cartridge in a 300WBY chamber and it often results in split shoulders. My thought is that by fire forming it with cream of wheat style loads and freshly annealed necks that it might help prevent the split shoulders?

Worky:

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No worky:


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Try using 300 H&H cases to fire form 300 WBY cases

 

[orygun]

Try using 300 H&H cases to fire form 300 WBY cases

Should work well, but I don't think there would be much savings.

 

[ORhutner]

You would also have the danger of 300 winmag head stamped brass loaded to 300 Weatherby. Whenever there is properly headstamped brass available for a cartridge I will use said brass for this reason alone. You never know who or when someone may get a hold of your experiment and things could end in disaster. Playing with controlled, high pressure explosions isn't the hobby to color way outside the lines.

 

[awags_86]

300 Winchester Mag - Rifle Brass - Metallic Reloading - Graf & Sons

www.grafs.com

Seems like a lot fiddling around for no reason. Just buy a couple hundred pieces of quality brass and it will last till you need a new barrel

 

[arakboss]

300 Winchester Mag - Rifle Brass - Metallic Reloading - Graf & Sons

www.grafs.com

Seems like a lot fiddling around for no reason. Just buy a couple hundred pieces of quality brass and it will last till you need a new barrel

300 Weatherby Mag - Rifle Brass - Metallic Reloading - Graf & Sons

www.grafs.com