what wildcat's are out there made on a shortened magnum cartridges?

Mr. Friendly

Mr. Friendly

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I was reading in an article that shorter but stouter bodies tend to have better performance than cartridges that don't. it made me wonder if there are wildcats using that theory on the big .300 WM cartridge. I'm not talking about just necking down or necking up, but physically shortening the round (kind alike the .30 T/C is based on a shortened version of the .308 Win).

I would have guessed the .243 WSSM may have been...but it says it's based on the .300 WSM, which appears toh ave be an entirely newly developed cartridge as the .300 WM isn't listed as the parent cartridge.

with all the hubub about how superior the 6.5mm bullets are for target shooting and hunting, it made me wonder if there were any 6.5mm or 7mm cartridgges formed on a shortened .300 WM or possibly other magnum cartridges to take the apparent ballistic advantage to the max.
 
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The 6.5-284 has a fairly short barrel life as it is. My next 6.5 was a 260 Ackley in an attempt to get more out of my barrel.

A 6.5 based on a fatter case than a 284 (which is quite fat) would have a barrel life around 1000 rounds. Not much.

Been there. Done that with a 22-250 Ackley.
 
short barrel life due to bullet velocity burning out the rifling?

also, what is the reality in taking a scenario like this as an excuse to shoot heavy for caliber bullets to get the advantage of an even better ballistic coefficient for hunting purposes?
 
Mr. Friendly said:
short barrel life due to bullet velocity burning out the rifling?

also, what is the reality in taking a scenario like this as an excuse to shoot heavy for caliber bullets to get the advantage of an even better ballistic coefficient for hunting purposes?
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Barrel life seems to be the amount of powder in the case vs the bore size. Making the case fatter means more powder and less barrel life.
 
I updated my subject for accuracy/clarification.

belted doesn't matter. just cases that were taken and shortened significantly to create a short and fat cartridge. say the .300 Win Mag and played with to create a 6.5mm variant that looks akin to the 6.5 Grendel; short and fat. :)
 
Mr. Friendly said:
I updated my subject for accuracy/clarification.

belted doesn't matter. just cases that were taken and shortened significantly to create a short and fat cartridge. say the .300 Win Mag and played with to create a 6.5mm variant that looks akin to the 6.5 Grendel; short and fat. :)
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The 300 WSM - and all it's children and grandchildren- is a former wildcat based on the .404 Jeffery Cartridge. I suspect several people developed similar cartridges but it is Rick Jameson who holds a patent for the design.

That patent btw was held up in court after Winchester started building rifles chambered for it and claiming it was their development. Winchester, and other manufactures, now pay a stipend to Mr. Jamison for rifles so chambered. That is also the reason Ruger quit chambering for the WSM cartridges.
 
'Boo said:
The 300 WSM - and all it's children and grandchildren- is a former wildcat based on the .404 Jeffery Cartridge. I suspect several people developed similar cartridges but it is Rick Jameson who holds a patent for the design.

That patent btw was held up in court after Winchester started building rifles chambered for it and claiming it was their development. Winchester, and other manufactures, now pay a stipend to Mr. Jamison for rifles so chambered. That is also the reason Ruger quit chambering for the WSM cartridges.
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so nobody has taken any other magnum cartridge to develop 'short' magnum options?
 
Andy said:
The 7mm Rem Mag and 264 Win Mag are both based on a shortened 300 Win Mag cartridge.
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The 458 was first from Winchester, then the 338 and 264, then the 300 last.

Of course Wildcatters had long had their way with the shorted H&H case.
 
dan belisle said:
On the unbelted cases I'd say the WSSM cases are the shortest. - dan
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I agree. The 25 WSSM next to a 250 Savage and 22-250 both of which are "short" standard cartridges.

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