300 wby vs 300 win mag

IdahoCTD

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The Weatherby is 100-150fps faster. I have a couple 30-8mm Rem. Mag's (basically the same as a .300 Weatherby) and they run 3100fps with 210's where most .300wm's run 2950-2975fps. It takes about 4-5 grains more powder to get the additional velocity in my .30-8mm's. The Weatherby will be a bit more with the excessive freebore. The .300 Norma, .300RUM, and .30-378 are even faster if recoil and price aren't a issue.
 

MudRunner2005

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Check out the .300 Ackley Mag. Basically it's an improved 40* shouldered .300 Wby. You even form brass from .300 Wby brass. Starting load data is that of .300 Wby.

Brass forming is simple. All you have to do is load some new .300 Wby brass and shoot it through your rifle, and out pops a .300 Ackley brass.
 

4xforfun

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Oct 1, 2007
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I am going to stick to the OP's paramiters....I LOVE the 300 WBY. I have done the load wokup on quite a few WM's and WBY's, so I feel that I am qualified enough to dicuss it. I like to shoot the berger 230, so the WBYs extra boiler room is a big help. I have been shooting WBY's in 1000 yard competition, and have done LOTS of tinkering with it over the years. my findings.....go strait to RL 25. I have MANY WBY tubes and they ALL love RL 25.

I am not saying that the Akleys, Normas, Lapuas, ect arn't great rounds....just keeping with the OP.

Tod
 

alaska

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Feb 1, 2010
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North Pole
I have both the 300 Win and 300 WBY

When handloaded the 300 WBY with 180gr really is a great flat shooting round with a 26" barrel. My MK5 has seen a lot of hunting over the years.

3300 FPS with IMR 7828 and the 180gr bullet Nosler Part.......most excellent.

The 300 Win is still shy of this but still a excellent round. My Rem 700 5R in 26" in 300 WM is a great shooter with 190gr and RL 22 and 220 MK with H1000.
 

Hoss50

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Apr 7, 2019
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If you reload, 300 weatherby. If you only use factory ammo, 300 win mag.

I have shot both. I handload. I prefer 300 weatherby.
 

sw282

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Dec 29, 2015
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The 300 Weatherby is simply a blown out 300H&H case. lt was thought up by wildcatter Roy Weatherby. lt takes a special long magnum action. The 300 Winchester Magnum is shorter and fits in a standard 30-06 action. Granted, you get a tiny bit more speed with Ole Roy's wildcat. The 300 Winchester beats Roy's 300 six ways to Sunday in the ACCURACY department. Accuracy is to quality as speed is to quantity. l choose quality over quantity ANY DAY🤗
 
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Swamplord

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May 2, 2004
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not sure you know what you're talking about, seems to be generic bs you're parroting that you read somewhere, rather than actual, physical experience with both cartridges along with multiple others as a direct comparison, 30 caliber has been my world for 30 plus years and I can assure you the 300 Wby is capable of same accuracy as the 300 Win Mag, same with the 30-378 Wby
 
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