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Reloading Berger Bullets


Factory load data

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Unread 07-06-2011, 05:39 PM
Junior Member
Join Date: Dec 2010
Location: WI
Posts: 4
Factory load data

Does anyone know the specs for the Winchester loaded ammo== for a
300 Win Mag with a 150 gr. Win SP Bullet. Not the silvertip, just a Win softpoint?

THANKS to everyone who can help!!

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Unread 07-06-2011, 06:58 PM
Platinum Member
Join Date: Oct 2007
Location: Mountians of SW NC, near Asheville
Posts: 1,595
Re: Factory load data

All any factory load reveals is muzzle velocity, not the powder or charge. That's okay because factories don't use cannister powders anyway, they mix and blend what they have tons of to meet their criteria of pressure and velocity.
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Unread 07-06-2011, 07:12 PM
Gold Member
Join Date: Feb 2008
Posts: 994
Re: Factory load data

Unfortunately, that's impossible to answer!
The only ones that know that are Winchester, and even if you could find the recipe, the powder they use is not available to handloaders.
They use a 'bulk' powder that is blended in the laboratory to give the desired ballistics, which is often different to previous loads in a batch.

You can always try to duplicate the velocity, and the nearest powder we have at our disposal is Win Supreme 780. This is very similar to what is loaded in factory loads for the 300.

Good luck with it, and enjoy!

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