I have seen a fair bit of discussion about a wildcat the 7mm/300 Win and a very similar 7mm Practical which is the same wildcat with a sharper shoulder and slightly long neck.Some claim7 STW ballistics with less powder and longer barrel life. Anyone have any experience with this wildcat? is there any velocity gain over the 7mm Rem and Wby ??

wouldn't that be basically the same as the 7 SH?

Are you meaning the 7x61 Sharpe and Hart ??

quote:

Originally posted by jeffeosso:
wouldn't that be basically the same as the 7 SH?

Could you please explain what you mean by 7SH ???

quote:

Originally posted by snowman:
Are you meaning the 7x61 Sharpe and Hart ??

Yes sir - that's what i meant
https://en.wikipedia.org/wiki/...61mm_Sharpe_%26_Hart

quote:

Originally posted by jeffeosso:

quote:

Originally posted by snowman:
Are you meaning the 7x61 Sharpe and Hart ??

Yes sir - that's what i meant
https://en.wikipedia.org/wiki/...61mm_Sharpe_%26_Hart

No the 7x61 S&H is now where close to the 300 Win mag case.The 7x61 S&H case is 61 mm long or 2.394" The 300 Win case is 2.62 " Almost a quarter inch longer. The 7mm/300 Win wildcat is longer than the 7mm Rem mag and a little shorter than the 7 STW. The std 300 case necked down to 7mm has an even shorter neck than the 300 win has. To improve the short neck the shoulder angle was increased to create a slightly longer neck and has been called the 7mm Practical. Some have claimed 7 STW ballistics with close to 10 grs less powder from a readily availible case (300 Win). My question was does anyone have any experience with either of these wildcats. This has nothing to do with the 7x61 S&H

I thought the 7mm 300 was a 7mm mashburn???

sure looks like it
https://4drentals.com/product/7mm-mashburn-magnum/

Didnt Warren Page use the 7mm mashburn alot.

The Mashburn has the shoulder pushed back .040 or .050 " and has a little sharper shoulder. But they are close

Had a bit of trouble finding a set of dies and a chamber reamer at a reasonable price. Finally found a reamer and dies in 7mm Mashburn Super mag. which is the 2.62" version. Barrel Action and reamer are at the gunsmiths right now. In the meantime I'm preping cases.Looking forward to playing with this

The 7mm Practical was created by Nathan Foster, of New Zealand, in an effort to achieve better ballistics than the 7 Mag, but without the short barrel life of the STW. It is, essentially, the 7mm Mashburn Magnum brought up to date. Reamers and headspace gauges are available from Manson Reamers, Inc. I had one built during a visit to NZ a number of years ago and it's everything he claims for it.

To those unaware of Nathan's incredible volume of work evaluating all manner of bullets and cartridges, I suggest going to his website,
www.ballisticstudies.com.

I've know Nathan for many years and, in my opinion, you won't find a more knowledgable ballistician or a less-BS hunting writer.

Dave Manson

Bob Hagel was a big fan of the Mashburn.
If it was me, I would choose a bullet I liked, and make sure the throat is long enough to seat the bullet out full length of the mag box.
By throating out my Rem 700 7 mag. I can get over 3000 fps with 175's and H 870 powder. The 700 has a .375 length mag box.

Im having the throat made to accept 160 gr Noslers seated to the base of the neck. Its being built on a trued Rem 700 action so lots of magazine space. This will be a hunting rifle not a target gun.

Sounds like we think alike..... maybe not a good thing.

My 7mm Mashburn barreled action came back from the gunsmiths.. Ive got 100 cases formed from Win headstamped 300 Win mag brass.I have some test loads ready to go to the range to start fireforming and to get the rifle shooting on paper. Looks like next weeks weather is going to co-operate. Looking forward to some range time

Made it to the range yesterday and got shooting my 7mm Mashburn. Got it shooting on paper (scope adjusted ) then went to 100 yds. Started shooting some test loads with 154 gr Hornady spire pts and IMR7828. This combination shows promise. Time to get more test loads ready and back to the range next week

Had another range day with my 7mm Mashburn. 154 Hornadys and 7828 are producing 3/4 inch groups @ 100 yds. 70-72 grs all group to the same spot and group size. would still like to try Retumbo and StaBall HD but I cant see getting better performance than 7828 is giving me

quote:

Originally posted by snowman:
I have seen a fair bit of discussion about a wildcat the 7mm/300 Win and a very similar 7mm Practical which is the same wildcat with a sharper shoulder and slightly long neck.Some claim7 STW ballistics with less powder and longer barrel life. Anyone have any experience with this wildcat? is there any velocity gain over the 7mm Rem and Wby ??

It is also known as the 7mm Yukon, and the 7x66 Argentine. An acquaintance has one, I have shot it side by side with my 7 STW. Both Rem 700's, both with 24 inch barrels. STW is slightly faster, but that could change with two different barrels, as there wasn't a huge difference. Certainly the 7-300 WM would be easier to source brass for. - dan