Long Range Hunting Online Magazine

Go Back   Long Range Hunting Online Magazine > Rifles, Reloading, Optics, Equipment > Rifles, Bullets, Barrels & Ballistics

Rifles, Bullets, Barrels & Ballistics Applied Ballistics


heavy 257 weatherby

LinkBack Thread Tools Display Modes
Unread 11-21-2006, 06:39 PM
Silver Member
Join Date: Sep 2005
Location: South Central Missouri
Posts: 332
Re: heavy 257 weatherby

so what is the difference of a 06 long action and a 375 long action? Is this a mauser 98 thing with a short, long and long long action? Don't know about parker hale actions just know that with a long action 06 remington one could make a 7AM out of a stock remington long action just would require some opening up of feed rails and mag box, and bolt. sounds more like a feeding issue. Not meaning to be a smart A## just don't see the difference in the length of the action being a drawback when one is dealing with a long action to start with.
Reply With Quote

Unread 11-21-2006, 07:29 PM
Silver Member
Join Date: Jan 2003
Location: Wallaroo, South Australia
Posts: 201
Re: heavy 257 weatherby

BLYGY, To help you work out the magazine length required with the 257 Weatherby. The bullets listed below has the following overall lengths if they are seated with their base level with the base of the case neck:

115 grain Nosler BT (1.204) - 3.436 inches
125 grain Wildcat ULD (1.268)- 3.500 inches
130 grain Wildcat BCFBHP (1.220) - 3.452 inches

I found that my Shilen 24 inch 1 in 10 twist barrel on my 25/06AI stabilised and shot accurately the 130 grain Wildcat BCFBHP, and also stabilised and shot reasonably accurately the 125 grain Wildcat ULD. Next time I would order a 1 in 8 twist barrel for that gun so that I have the ability to use bullet weights up to an including the Wildcat 142 grain ULD.

You might be interested to hear that several weeks ago I conducted an experiment, and found that my custom 257 Weatherby (no freebore) when using new Norma 257W brass in my Krieger 26 inch 7 twist barrel barrel was only 75 fps faster than my 25/06 AI (Remington brass already fired 9 times) with a 24 inch barrel.

So if you allow about 50 fps for the extra 2inches of barrel length of the 257W, I gained about 25 fps for the extra 19 grains of case capacity over the 25/06AI.

The experiment showed that Norma 257W although consistent is soft, and wont safely handle the pressure that Remington and Winchester cases will do.

I subsequently purchased a bag of 50 300 Winchester Magnum cases (Remington brass), necked them down and formed 257W cases, and then neck turned to get the proper clearance. These cases had a capacity of 85.2 grains compared to the 88.3 grains of the new Norma 257W brass, so they are obviously thicker. After their first firing it appears that they will probably produce an extra 75 fps at maximum pressure over the 257W Norma brass, but I will fire them several more times to confirm this.

Hope that the above information is of some help. Brian.
Reply With Quote


Thread Tools
Display Modes

Similar Threads for: heavy 257 weatherby
Thread Thread Starter Forum Replies Last Post
FS: Vintage 1960's made in germany Weatherby Mark V in Weatherby 300 mag. stover954rr Guns For Sale 3 12-18-2013 09:53 AM
How heavy a gun is too heavy for hauling? 7mmpredator Backpack Hunting 48 10-26-2010 07:46 PM
257 Weatherby Krieger 26" Stainless Heavy 700 Remington Barrel for sale sambo3006 Gun Parts - Stocks, Barrels, Actions, etc. 3 11-18-2009 10:51 AM
Freebore excess in Weatherby rifles chambered in non-Weatherby rounds? Yorkplates Rifles, Bullets, Barrels & Ballistics 19 09-28-2009 08:41 PM
Peak Velocity of 300 weatherby heavy MKs? Sheldon Rifles, Bullets, Barrels & Ballistics 0 11-29-2002 12:36 AM

All times are GMT -5. The time now is 06:45 AM.

Powered by vBulletin ©2000 - 2016, Jelsoft Enterprises Ltd.
Content Management Powered by vBadvanced CMPS
All content ©2010-2015 Long Range Hunting, LLC