7mm/300 weatherby

[Possum284]

Hey this is my first post and wanted all the info I can find on the 7mm/300 weatherby I tried searching but found nothing I was thinking about having my winchester rebarreled would this round be comparable to the stw. I am planning on using 180 bergers or heavier.
Thanks Possum

 

[jwp475]

It would be a ballistic twin IMHO

 

[Possum284]

Thats what I have heard

 

[adam32]

What about the 7mm/378 Weatherby?

 

[Possum284]

seems like overkill

 

[James Jones]

Balisticaly the 7mm-300Wby is the same as the 7mmSTW , the Wby case has a tiny bit more capacity but the soft Norma brass won't let you take advantage of it ,you will be able to run the STW up to the same speed with a little more pressure though.

If you gonna go through the hassel then I do a 7mm STW Ackley improved , not alot will be gained from the improvement except case life. You can also shoot factory loaded 7mmSTW ammo out of a proberly cut Ackey chamber with little loss in speed or accuracy.

The 7mm-378Wby is way overbore capacity , you would only see any real benifit with very heavy bullet out of a very long barrel and the barrel life would be very short.

Necking down to 7mm and Ackley improving a 300 win mag case has been a though of mine for a while , I'm pretty sure that you would get the same maybe a we bit more case capacity as the STW case but it would be a little shorter and you would have the option to use the awsome lapua brass if you don't mind paying $1.50 a case , but 100 cases would last the life of the barrel.

then theirs always the 7mmRUM

 

[adam32]

Balisticaly the 7mm-300Wby is the same as the 7mmSTW , the Wby case has a tiny bit more capacity but the soft Norma brass won't let you take advantage of it ,you will be able to run the STW up to the same speed with a little more pressure though.

If you gonna go through the hassel then I do a 7mm STW Ackley improved , not alot will be gained from the improvement except case life. You can also shoot factory loaded 7mmSTW ammo out of a proberly cut Ackey chamber with little loss in speed or accuracy.

The 7mm-378Wby is way overbore capacity , you would only see any real benifit with very heavy bullet out of a very long barrel and the barrel life would be very short.

Necking down to 7mm and Ackley improving a 300 win mag case has been a though of mine for a while , I'm pretty sure that you would get the same maybe a we bit more case capacity as the STW case but it would be a little shorter and you would have the option to use the awsome lapua brass if you don't mind paying $1.50 a case , but 100 cases would last the life of the barrel.

then theirs always the 7mmRUM

I think that is the .284 Jarrett, if I remember right. It was a pretty awesome round for them.

 

[Varmint Hunter]

I have a custom 7STW that shoots great and was my "go to" rifle for quite awhile. Given that the two cartridges have nearly identical case capacity and ballistics; why choose the wildcat which will cost you more in the long run and be harder to sell if you decide to get rid of it in the future? Go with the 7STW.

However, seeing that you're not limited to just those two, why not consider the 7RUM? Quality brass is now readily available, which is usually a big consideration when choosing a cartridge for a new custom build. The 7STW will probably limit you to Rem brass which is arguably one of the worst available. I've heard that Win discountinued making brass in 7STW. You could make 7STW brass from other magnum cartridges (300Wby-300Win) but why would you want to go through that unless you have to?

Just my 2 cents but I'd give the 7RUM a good hard look and maybe even the 7WSM if you would like to extend your barrel life.