I'm starting to work up a load for a new 7mm/300 weatherby and was wondering if anyone here has loaded for one of these if so any help with data would be much appreciated.Thanks Ronnie

I just finished with a pair of rifles in 7mmX300 Weatherby and here is a couple of starting loads that should work in your rifle - PROVIDED THAT IT IS "NOT" SHORT THROATED!!!

The "throats" on my 7mmX300 Weatherbys was set for 160 gr. SPEER flat base bullets seated to the base of the neck, while lightly engaging the rifling at the same time...

CASE: Nosler Custom 300 Weatherby brass necked down to 7mm

PRIMER: Federal Gold Medal Magnum Match

POWDER: IMR-7828 / 76.0 gr.

BULLET: SPEER 160 gr. Hot Core Flat Base

VELOCITY: 3,062 fps.

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CASE: Nosler Custom 300 Weatherby brass necked down to 7mm

PRIMER: Federal Gold Medal Magnum Match

POWDER: H-1000 / 75.5 gr.

BULLET: Sierra 175 gr. Boat-Tail Spitzer

VELOCITY: 3,000 fps.

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CASE: Nosler Custom 300 Weatherby brass necked down to 7mm

PRIMER: Federal Gold Medal Magnum Match

POWDER: IMR-7828 / 78.3 gr.

BULLET: Hornady 162. gr. A-MAX

VELOCITY: 3,144 fps.

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For shooting deer out to 1,000+ yards, the Hornady A-MAX will usually make an entrance hole the size of a #2 pencil and leave an exit hole no smaller that a golf ball - at least with my experiences on broadside shots high and centered on the front shoulder...

The above listed loads were "mild" in our rifles but should always be worked up to slowly in a different rifle....

A

That should have pretty much the same case capacity as the 7mm STW. Starting loads for that case should be a good way to go for your wildcat.

[QUOTE=faucettb]That should have pretty much the same case capacity as the 7mm STW. Starting loads for that caseshould be a good way to go for your wildcat.[/QUOTE

Thanks for the input guys I to thought of using 7 STW info for starting loads and will if I have to. The rifle isn't short throated but nephew is wanting to shoot a 139 grain hornady do you all have anythig worked up with that light of a load? If it were me I would load nothing lighter than 160s but he really wants to try the 139s for sure they will be explosive at these speeds going to ruin alot of meat but its his call and again thanks much for the input any help is much appreciated...Ronnie

I did not know how light in bullet weight but I do have a load specifically for the 139 gr. Hornady spire point -

CASE: 300 Weatherby brass necked down to 7mm

PRIMER: Winchester WLRM

POWDER: IMR-7828 / 82.0 gr.

BULLET: Hornady 139 gr. Spire Point

VELOCITY: 3,518 fps.


Deer shot with this bullet and load at these velocities is devastating. If possible, shoot high on the top point of the front shoulder - where he stands, is where he falls...

Again, this load is safe in our rifles, chambering and throating design for the 7mm-300 Weatherby but, should be worked up to slowly, watching for signs of excessive pressures...

Like faucettb pointed out, the 7mm STW would be a good and safe place to start for all loading data for the 7mm-300 Weatherby....

A

I did not know how light in bullet weight but I do have a load specifically for the 139 gr. Hornady spire point -

CASE: 300 Weatherby brass necked down to 7mm

PRIMER: Winchester WLRM

POWDER: IMR-7828 / 82.0 gr.

BULLET: Hornady 139 gr. Spire Point

VELOCITY: 3,518 fps.


Deer shot with this bullet and load at these velocities is devastating. If possible, shoot high on the top point of the front shoulder - where he stands, is where he falls...

Again, this load is safe in our rifles, chambering and throating design for the 7mm-300 Weatherby but, should be worked up to slowly, watching for signs of excessive pressures...

Like faucettb pointed out, the 7mm STW would be a good and safe place to start for all loading data for the 7mm-300 Weatherby....

A

Assassin again thanks so much for your sharing it sure makes it alot easier on me to work up a load with at least a general idea where I can start if I can ever return the favor I will and again thanks to you all for the input..Ronnie

Glad we could help...

Just be careful, load safe and God Bless....

A