Pondering a wildcat.

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Grumpy_old_Fart

Grumpy_old_Fart

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Need to ask for some input, really not reinventing the wheel, just trying to get more mpg out of it.

looking at the SAUM cases, the RUM cases, Nosler cases, the 300 PRC... etc.

short fat seems efficient. RUM and Nosler are overbore for powder consumption/performance.

There isnt much in between, I think mostly because there isnt much out there for a mid length action. its either long or short.

With all of that muttered, I want to kick out a thought and see what you guys think..

Take the 300 PRC case, shorten it. Neck it down to .277. case capacity should be right at 78-85 grains to the shoulder. Long neck to support long for caliber bullets. say... .310-ish

The intent is to take a case and load it to 93% capacity, push a 170 grain Berger bullet to 3000 fps and not burn out a barrel, not produce huge recoil and still be usable on game over 500 yards. Loadable in any long magnum action for the ability to tune the leade.

with a 1:8 twist barrel, I think it might be pretty accurate at range.

Your thoughts?
 
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I havent looked at the 277 fury yet.. the western is a shortened 270wsm case. I was kind of hoping for an "in between" cartridge... in between short action and long action...

edit... I have seen the sig fury 277. Not wanting to work with 80psi working pressures..
 
I have a 6-284 and a 257 WSM built by the same person. I used a 270 WSM case and just had it necked down to .257. Probably not the most efficient 257 but it works really well. I haven.t fired a bunch of rounds thru it. Maybe this year I can do a real work-up on it.
 
Doesnt matter what the caliber when you start
Pushing 3000+ fps its going to eat barrels,
Even the creed is concidered a barrel burner
(1700-1800rnds). 6.5 prc is, simular to the 6.5x284.roughly 1,000-1,200, rnds
 
Grumpy_old_Fart said:
I havent looked at the 277 fury yet.. the western is a shortened 270wsm case. I was kind of hoping for an "in between" cartridge... in between short action and long action...

edit... I have seen the sig fury 277. Not wanting to work with 80psi working pressures..
Click to expand...
the 6.5 prc - 6.8 western are medium action ,
Not a, true short action caliber
 
Let me throw this out there..

When action length isn't an issue, why not build a cartridge that only uses as much powder as necessary to attain the goal?

Say for instance if it was going in a Ruger #1?.

I know, a lot of people want bolt actions. But in a single shot action length is not critical.
 
Grumpy_old_Fart said:
When action length isn't an issue, why not build a cartridge that only uses as much powder as necessary to attain the goal?

Say for instance if it was going in a Ruger #1?.

I know, a lot of people want bolt actions. But in a single shot action length is not critical.
Click to expand...

I agree. 7mm Rem Mag. 170gr bullets all day long at about 3000 fps. Sometimes it’s not necessary to reinvent the wheel. :)

Some ideas.

View attachment 1048476
 
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Mark_Mark said:
FYI with Ruger #1 if you find a rusty scratch up one. Buy it send it back to the factory and they will refinish for you and a very GOOD (almost free) price
Click to expand...
That might be an option for one of mine. I found a 30-06 that had the barrel shortened to 22" and crowned. It's an excellent shooter though
 
Grumpy_old_Fart said:
That might be an option for one of mine. I found a 30-06 that had the barrel shortened to 22" and crowned. It's an excellent shooter though
Click to expand...
I’d definitely go with the No.1. Single shot rifles rock when you have a good chambering for them. At one time I had seven Martinis in a full range of sizes from .25-303 to .444Marlin. Sold them off a couple decades ago when Martini action rifles were kind of a craze. Short lived craze but I hit the crest of the wave. You can never go wrong with a good single shot rifle.
 
GeoDudeFlorida said:
I’d definitely go with the No.1. Single shot rifles rock when you have a good chambering for them. At one time I had seven Martinis in a full range of sizes from .25-303 to .444Marlin. Sold them off a couple decades ago when Martini action rifles were kind of a craze. Short lived craze but I hit the crest of the wave. You can never go wrong with a good single shot rifle.
Click to expand...
I want a #1 in 10 gauge
 
You might read the history of Roy Wetherby to get some insight into the 270 cal with 80 grain capacity cases. The 270 Wetherby was introduced in 1945 his first commercial success and had a case capacity of 82 grains. Nosler made a 160gr Partition .277 bullet, its performance down to 2,200 fps is interesting. If you read the history, including about the 270 Wetherby, I think you will get some additional insight about the .277 bullets.

My 240 Laser was built to shoot 6mm 115g VLDs, had a 1-7 twist. Only Nosler and Berger bullets would keep the jackets on. So you can reach the RPMs that rip the jackets off normal bullets.

Powder selection becomes limiting as does bullet selection. Most slow powders were developed for the column burn. In my WSM cases, I found myself using VN-560 to duplicate the standard performance of the tall magnums. Marketing hype is great for print, no so much compared to a real chronograph.
 
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