SOLD/EXPIRED 300WSM Lapua brass at BulletCentral

[JAYgs8163]

Lapua Brass, 300 Win Short Mag Brass, 4PH7080C, (Box of 100)

Discover the pinnacle of reloading excellence with Lapua's 300 Win Short Mag Brass, product number 4PH7080C, in a convenient 100-count box. Crafted for reliability and precision, this brass is the ideal foundation for high-performance rounds, preferred by competitive shooters and precision...

bulletcentral.com

 

[Justice1327]

If you take 300 WSM brass and neck it down to 7 mm… Will that fit and shoot safely in a 7 WSM chamber?

 

[JAYgs8163]

If you take 300 WSM brass and neck it down to 7 mm… Will that fit and shoot safely in a 7 WSM chamber?

I've never done it but there are numerous threads about doing it. I've got a nice supply of Bertram 7WSM brass and Winchester also.

 

[cohunt]

Isn't 7wsm longer? So you have to keep a false shoulder and blow it out iirc

 

[IDhunter0990]

If you take 300 WSM brass and neck it down to 7 mm… Will that fit and shoot safely in a 7 WSM chamber?

You need to neck down and false shoulder to fire form I would also jam bullets to make sure they form well.

 

[comfisherman]

*insert Pic of Calvin and hobbes rain dance cartoon.


Only took about 20 years but we now have lapua and adg to keep them feed.

 

[Earnhardt]

If you take 300 WSM brass and neck it down to 7 mm… Will that fit and shoot safely in a 7 WSM chamber?

No

 

[Justice1327]

No

Why not?

 

[Justice1327]

I've never done it but there are numerous threads about doing it. I've got a nice supply of Bertram 7WSM brass and Winchester also.

Yes, I see that but some say yes, some say no. I got plenty of Winchester and betram and federal Brass, but obviously I would like to have Lapua if I could.

 

[huntinfool18]

The 7wsm and 300 wsm have different headspace but looking at chamber drawings they both have the same overall case length so I suppose like mentioned before if you do the false shoulder or jam a bullet in the lands and fire form it should work.

 

[Earnhardt]

Why not?

Do you own any reloading manuals?...

If so, check out the case dimensions for the factory 7mm WSM, vs. the 300 WSM...

If you don't own any reloading manuals...please go buy one/some...

Thanks

 

[waspocrew]

Shoulder is the difference. Look at drawings of the case dimensions. As mentioned above, you'd want a false shoulder then you'd be good to go.

 

[JAYgs8163]

It can be done. It's a lot of work! It's been done by many with good results. Here's a good read about the steps involved. Sounds like some haven't had enough coffee yet this morning!

.300 / 7mm WSM neckingdown ?'s

Good day fellow shooters. I have been reloading for over 20 years but mostly for hunting applications and a few target applications. My most recent project is necking down .300 WSM brass to make 7mm WSM using Norma brass. I have never necked down, or "wildcatted" a cartridge so I have a few...

www.snipershide.com

 

[Justice1327]

So it seems like one would for an Ackley Improved. Nice to know and thanks for the info. I wonder how many people told P.O.Ackley that a wildcat couldn't be done by necking up or necking down a cartridge I'm sure they told him to go look in the manual too.