Know What You Own

[MagnumManiac]

I have seen that so many times, and as many know, I like to test the boundaries.
I have taken brass like that and sized it back to original without any drama, just take it slow and all is good. The brass is not over expanded anywhere but the shoulder.
I have deliberately fired 264WM rounds in a 338WM chamber to get 338WM brass, it almost gets fully formed shoulders.
Have deliberately fired both 300 Weatherby and 340 Weatherby brass in my 375 Weatherby to get fireformed 375 Weatherby brass.
Fired 243 Win in my 260AI to see if it worked, it did, but not to my liking.
I would take that brass for 1 of my 300WM if it weren't Federal, the bin is the best place for it.

Cheers.

 

[FrogFire7]

My son's friend made a mistake because he didn't know his gun. He shot some 300 Win Mag yesterday and gave me his brass. Well when I looked at it something was wrong. I was right. He has been shooting 300 Win Mag out of a 300 Weatherby Magnum. Look what it did to the brass. The right is the factory Federal 300 Win Mag. The left is the brass he shot out of a 300 Weatherby Magnum. That brass is already in the garbage.

When I worked weekends at the local gun shop, it was alarming how often somebody would come in looking for a "box of 300 shells".

Me: "Sure, we got em. What do you need? 300 win mag, 300 savage, 300 weatherby, 300 blackout?"

Them: "Yeah, whatever you got"

NOPE, not how it works...

Usually an out-of-towner in the shop after dark, looking for ammo for the season opener the next morning

 

[adk hunter]

The torx head screw not counter sunk in the bench top bothers me more...
Seriously though, thanks for sharing!!

 

[MagnumManiac]

My most successful test was determining how much neck tension/interference was required to keep a 264WM loaded case with only a primer installed, from pushing the bullet out when fired in my 270 Weatherby.
No amount of interference fit would keep the neck from expanding the .0005"-.0015" to allow the bullet to be propelled fast enough to break pages on a notebook. The bang was far more loud than just discharging a primer by itself.
This proved that necks don't hold bullets very long in the combustion process as many will tout as truth. Crimping is another facet all together.

Cheers.

 

[J_V_Berry]

I once bought a used rifle that was labeled on the barrel 7mm rm. That's what I wanted and that was what it was advertised as. Come to fine out that the husband of the lady who sold the rifle liked to tinker with his rifles. Not that anyone around here would do that. I took it out to the range to sight it in and it just sounded off. After firing the third round I stopped and noticed that the neck was stretched almost straight. Took it back to the lgs with the brass and showed them what happened. That was the fastest return I had ever seen. I am thinking he had it rechambered to 7stw.

 

[pavementends]

I would probably keep several of the cases and epoxy one over my bench as a reminder. Either that or label it a 300 Gibbs.2 and write internet articles about it and what an improvement it was over the slow factory stuff. While not the issue in this case it does illustrate "One rifle and one caliber on the bench at a time"

 

[CMP70306]

My son's friend made a mistake because he didn't know his gun. He shot some 300 Win Mag yesterday and gave me his brass. Well when I looked at it something was wrong. I was right. He has been shooting 300 Win Mag out of a 300 Weatherby Magnum. Look what it did to the brass. The right is the factory Federal 300 Win Mag. The left is the brass he shot out of a 300 Weatherby Magnum. That brass is already in the garbage.

So important question, was it an old Model 70 with "300 MAGNUM" on the barrel?

 

[SecretSquirrel38]

The torx head screw not counter sunk in the bench top bothers me more...
Seriously though, thanks for sharing!!

LOL Those torx head screws are through the counter into a 2x6 I put under the press where the dishwasher used to be for support. The counter is crap and I didn't counter sink the screws because I didn't want the counter to crumble.