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Reloading the 300 weatherby magnum

 
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  #1  
Old 06-02-2002, 05:08 PM
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Join Date: Apr 2002
Location: Sweden
Posts: 26
Reloading the 300 weatherby magnum

Hi goodfellas!
I might buy a Weatherby Mark 5 rifle in a couple of weeks. The caliber is 300 weatherby magnum. The gun is used, but appears to be in very good contition. All factory parts. Left hand model.
If anyone here has got some experience with this caliber please let me know of your favourite bullet, seating, etc.
Myself I have only experience loading pistol ammuniton. Is there something extra important to think about when it comes to magnum caliber realoading?
Thanks guys and gals.
Warm greetings from a sunny Sweden.
/Emil [img]images/icons/cool.gif[/img]
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  #2  
Old 06-06-2002, 03:37 PM
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Join Date: Feb 2002
Location: Mississippi Delta
Posts: 161
Re: Reloading the 300 weatherby magnum

The .300 Weatherby is my favorite rifle cartridge. I think you'll enjoy it. If I had to pick my favorite load it would probably be the following:

Powder: IMR 7828 (84 grains)
Brass: Norma
Primer: Federal 215M
Bullet: 180 grain Swift Scirocco
OAL: 3.56"

I have also had luck with other powders such as Reloder 22, H1000 and H4831. However, IMR 7828 seems to work the best in my rifle. I hope to try some Norma MRP and Ramshot Magnum soon. I am especially interested in the Norma powder.

I have tried various bullets and have had good results with just about all of them. As far as accuracy is concerned, I've had my best results with the Swift Scirocco, Hornady SST and Nosler Ballistic Tip (both 165 and 180 grains). I've also had surprisingly good accuracy with the Speer Grand Slam and Hornady Spire Point. The Nosler Partition, while an excellent game bullet, has not been so accurate for me in this cartridge. I prefer the Swift Scirocco to anything else because it's accurate, has a high ballistic coefficient and is stoutly constructed.

Since Weatherby rifles are freebored, I don't think varying the seating depth of bullets will have very much of an impact on accuracy. It hasn't for me at least. However, I have found that concentricity does seem to matter. I use a Lee Collet neck die to make very straight ammo that is remarkably accurate.

Good luck with the .300 Weatherby. You'll like it.
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  #3  
Old 06-06-2002, 11:40 PM
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Join Date: Apr 2002
Location: Sweden
Posts: 26
Re: Reloading the 300 weatherby magnum

Thanks!
I am very interested in your coice of bullet.
I will look into it.
Tell you about it later!
If someone else likes the caliber, please let us know your favourite bullet/load.
/OneShot [img]images/icons/cool.gif[/img]
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  #4  
Old 03-29-2013, 10:06 PM
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Join Date: Feb 2010
Location: Alaska
Posts: 333
Re: Reloading the 300 weatherby magnum

Reloader 25 is also a excellent powder in the 300 Weatherby

My choice of bullets is the 180gr Nosler Partition or Swift A frame.

Fed 215 primers in WBY brass
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  #5  
Old 03-29-2013, 11:24 PM
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Join Date: Jun 2011
Posts: 73
Re: Reloading the 300 weatherby magnum

I've had my markV for 20 years it has a 26 inch barrel I shoot rl 22 with 87 grains with a 180 accubond 3405 fps it's very hot but that's we're it shoots the best, I am in the process of looking for a carbon fiber barrel and stock and make it my pack in gun, You will not get much life out of your brass primer pockets stretch after a couple of loadings. I also seat my buulet just to fit the mag because of weatherbys free boring
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  #6  
Old 03-30-2013, 07:45 AM
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Join Date: Feb 2012
Posts: 807
Re: Reloading the 300 weatherby magnum

the best load in mine is a 180tsx barnes using re25 and a fed match mag primer. Im not a huge fan of barnes bullets but my 300wby is a finiky gun that is typicaly a 1.5 inch gun at a 100 yards and this load goes well under an inch for 5 shots and has dumped every deer ive shot with it.
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  #7  
Old 03-30-2013, 08:48 AM
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Join Date: Dec 2001
Posts: 787
Re: Reloading the 300 weatherby magnum

I guess no one read date on post it's from 6/2/2002.
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