Weatherby .500 wby magnum

One could also go with the 510 Van Horn based on the 460/378 Weatherby case shortened to 2.5" for standard 30-06 length actions. Launches a 600 gr bullet at 2100 fps from a 20" barrel.
Uber fun this chambering would be with hardcast. The P17 Enfield is a good action for one of these thumpers.
 
dan belisle said:
500 A-square isn't a 500 Wby, though quite similar in performance. Met Art Alphin back in the 90's in Kentucky. Interesting guy. - dan
Click to expand...

Ohh, i thought it was simply a 378 case necked up to 50cal

Much like the 378 case necked upto 416 made the 416 weatherby and the 378 case necked upto .458 made the 460 weatherby

So if weatherby necked its 378 case to 50cal it would have been 500 weatherby. But someone else did it so they changed the name was my thoughts. But if the rifle was made before 1978 it would have been a wild cat and one could call it anything they wanted too. 500 weatherby would have made the most sense really.

Interesting either way

This is what i found. So you may be correct. Althougj i believe its near the same thing.

"That cartridge is a wildcat. Originally loaded in blown out and necked up Weatherby 460 Magnum brass by Arthur Alphin in 1974-79 and later loaded in cases marked A-Square after the formation of the A-Squae Co. Bullet weight 600 gr. different MV from 2070 to 2450 fps with ME in excess of 10,000 Ft LB.
If your case is a Weatherby head stamped case, it most likely is an original Alphin loading from the early to mid 1974 era before A-Square Co. was formed.
Hope that is some help.
`57 Mountie"
 
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Evanguy said:
Ohh, i thought it was simply a 378 case necked up to 50cal

Much like the 378 case necked upto 416 made the 416 weatherby and the 378 case necked upto .458 made the 460 weatherby

So if weatherby necked its 378 case to 50cal it would have been 500 weatherby. But someone else did it so they changed the name was my thoughts. But if the rifle was made before 1978 it would have been a wild cat and one could call it anything they wanted too. 500 weatherby would have made the most sense really.

Interesting either way

This is what i found. So you may be correct. Althougj i believe its near the same thing.

"That cartridge is a wildcat. Originally loaded in blown out and necked up Weatherby 460 Magnum brass by Arthur Alphin in 1974-79 and later loaded in cases marked A-Square after the formation of the A-Squae Co. Bullet weight 600 gr. different MV from 2070 to 2450 fps with ME in excess of 10,000 Ft LB.
If your case is a Weatherby head stamped case, it most likely is an original Alphin loading from the early to mid 1974 era before A-Square Co. was formed.
Hope that is some help.
`57 Mountie"
Click to expand...

This^^^^^^
 
Evanguy said:
Ohh, i thought it was simply a 378 case necked up to 50cal

Much like the 378 case necked upto 416 made the 416 weatherby and the 378 case necked upto .458 made the 460 weatherby

So if weatherby necked its 378 case to 50cal it would have been 500 weatherby. But someone else did it so they changed the name was my thoughts. But if the rifle was made before 1978 it would have been a wild cat and one could call it anything they wanted too. 500 weatherby would have made the most sense really.

Interesting either way

This is what i found. So you may be correct. Althougj i believe its near the same thing.

"That cartridge is a wildcat. Originally loaded in blown out and necked up Weatherby 460 Magnum brass by Arthur Alphin in 1974-79 and later loaded in cases marked A-Square after the formation of the A-Squae Co. Bullet weight 600 gr. different MV from 2070 to 2450 fps with ME in excess of 10,000 Ft LB.
If your case is a Weatherby head stamped case, it most likely is an original Alphin loading from the early to mid 1974 era before A-Square Co. was formed.
Hope that is some help.
`57 Mountie"
Click to expand...

Yes. The 500 Wby was simply the 460 Wby case with the neck opened up to accomodate the 50 cal bullets. 500 A-Square changed the case dimensions slightly. Ballistically there is little difference. But the changes let Art put his brand on it. - dan
 
I have a very similar rifle: a Weatherby Mark V in 505 Pietsch (505/416Rigby), and have shot it a fair amount.

If you do everything right: I found the recoil surprisingly manageable. Of course if you do anything wrong, the correction is...vigorous.
 
When I had my 510 wells built it was on a wby action. I could of had the smith stamp it 500Wby. He said he would even do the other stamping to make it look factory. I even found 500wby stamped brass. Its a very nice gun what you have there. Call wby and see if they ever made a prototype just in case. You never know.
 
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