Just floating this idea, just want to know if it is even possible. Could one take a WSM case and blow it out to accept 50cal BMG bullets. Designed intent would be to dublicate the performance of a 50 cal Whisper, but do so in a more economical package. Again, just wondering If it would fly (biggest problem seems to be the shoulder, or lack thereof) thanks
I have looked into using the RUM case blown out and necked up to .510" but never felt comfortable enough with the small shoulder, even with a max blown out case to try it.
The WSM will have considerably less powder capacity then the Whisper and it used the big Wby hulls. Still the 500 Whisper is designed to work at 1050 fps and I would think the WSM case could provide that with top loads.
Still, the shoulder issue will be a concern.
A better case would be the Lazzeroni Short Magnum case as it is basically the same capacity but in a bit shorter and even fatter case.
I personally do not care for the quality of Lazzeroni brass so this is why I would not go that direction but it would provide a more positive shoulder, especially if sharpened up to 40 degrees or so.
Also, at the price of the Lazzeroni brass, the big Wby hulls are cheaper by a fair margin and much better in quality in my opinion.
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The 500 Jeffery case has a smaller rim diameter than the big Weatherby or Rigby cases, (slightly larger than the WSM) it has more water capacity and is shorter ta boot... a good choice, with Horneber brass.
I wouldn't trust the little itsy-bitsy shoulder that would be left with a 510/300 WSM... if you could even call it a shoulder.
Economical being cheaper brass, it don't get much better than the big Weatherby stuff for $2.00 each, well, besides surplus 50 BMG ammo.