What happened to this brass?

[jbob223]

Bullet diameter on the Legend is .357, not .355. Like I said- it's basically a rimless 357 Maximum. Here's a link to the Winchester site with dimensions on the Legend. https://winchester.com/350-legend/faq

Winchester specs .357"
Others spec .355" including the first people to chamber the round.
Nice mess eh ?
Here is a link that might help explain the mess.

What's Going On With .350 Legend? - The Truth About Guns

I’ve been asked a lot about the new .350 Legend cartridge, the round that’s set to take on the .450 Bushmaster in the straight-wall legal midwest woods. The .350 Legend has a number of great advantages, and it’s gotten a very positive reception. But there are questions about the cartridge that...

www.thetruthaboutguns.com

 

[Kingsgr8]

By looking at my books, that is exactly what this is.. 300 W/M fired through a Weatherby chamber. this will be a pain in the butt to reform.

I tried to reform a few but it was hit and miss. Some did others caved in. Have yo figure a way to do it in steps. But at this point in my life not worth the hassle

 

[cohunt]

Bullet diameter on the Legend is .357, not .355. Like I said- it's basically a rimless 357 Maximum. Here's a link to the Winchester site with dimensions on the Legend. https://winchester.com/350-legend/faq

But chamber specs are .347 lands with a .355 groove per the saami specs

 

[Wolf76]

But chamber specs are .347 lands with a .355 groove per the saami specs

Yes it's confusing. With the throat recut, you can use .358 bullets. Trust me, Winchester biffed on launching this cartridge correctly.
That said, it's a pretty neat round. Puppy dog to shoot, more power than a 30/30 and will be very deadly when they figure out the right bullet.

 

[Tulsa Reiner]

"If you fire a 300 WM in a 300 Weatherby chamber the neck length of the case will end up approximately .390 thousandths long. So that looks like what happened to me." (JE Custom)

JE, I appreciate your candor.
I suspect the more calibers you shoot, the more likely it is to happen.

 

[gator378]

Yep, Saw a guy shoot a 7 mag in a 300 Win mag once too. That makes real funny looking brass

 

[gator378]

Never mess with physics. Physics always wins and you lose. When in doubt follow the instructions