25/7mm Mag data?

CastleRocker

Well-Known Member
Joined
Apr 7, 2008
Messages
60
Location
SW Washingon
Sorry for the confusion. It is a .25-7mm mag., that's a 7mm Remington Magnum necked down to .257 caliber. It's a wildcat cartridge. It should be very accurate (with the right load), scary fast, and with the new, high BC bullets out there now, should fit my Dad's desire for a light recoiling semi-long to long range rifle for coyotes and pronghorns.

The problem is, I don't have the time to start loading/chronographing from scratch, and was hoping someone else out there had played around with this one.

Thanks!
 

358sta

Well-Known Member
Joined
Aug 21, 2006
Messages
187
Location
Longmont, CO
Sounds very similar to Weatherby's 257 Mag. You probably don't have the Weatherby freebore in your rifle but using 257 Wthby starting loads should be a safe starting point.
 

dirtball

Well-Known Member
Joined
Jan 18, 2007
Messages
795
Location
Fairfax County, Va
The 257 Weatherby and the 7mm Rem Mag both have a case capacity of 80 to 81 grains of h2o, so it you used 257 Weatherby data and reduced by 10% to start, you should be safe.
Dave
 

CastleRocker

Well-Known Member
Joined
Apr 7, 2008
Messages
60
Location
SW Washingon
Thank you very much!!! I don't know why I didn't think of that...I used to have a 257 Wby! I guess I deserve a "DUH" for this question.

Thanks again!
 

Primary

LRH Assistant
Here are some related products that LRH members are talking about. Clicking on a product will take you to LRH’s partner, Primary, where you can find links to LRH discussions about these products.

 
 

Recent Posts

Top