High performance 350 Remington Magnum

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Right, 9.3x57. CIP specifies 3000 bar = 43,511 psi maximum pressure. The 35 Whelen is similar in capacity as the 9.3x57. For comparison, the Woodleigh manual lists 2345 fps maximum for their 275gr bullet in the 35 Whelen, and SAAMI maximum pressure is 62,000 psi.
 
Bare said:
2700 with a 250gr is pretty quick. My 9.3x62 only pushes them at 2600fps with a max load of big game. I can only get my 35 Whalen to 2700 with 225gr
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In my 35 Whelen, I see 2600 fps with a 250 gr Hornady over a compressed load of 66.0 grs of Re17 at an OAL of 3.400"

In my 9.3X62, I also see 2600 fps with a 285 gr Prvi over a compressed load of 67.0 grs of Re17 at an OAL of 3.300"

Re17 has about the perfect Burn Rate and Density for both these rounds, but I have some Re16 I have yet to try.
 
Pretty decent 35 Whelen performance. With a 24" 1:16" barrel 35 Whelen I've seen a bit over 2500 fps using 250gr bullets and a near maximum charge of Re15.

But lacks the efficiency of my 350 RM which will drive a 250gr bullet at 2800 fps with nearly the same amount of Re17 you are using and without compression. A sharper case shoulder coupled with shallow seating depth, generous throat length and a longer barrel will do that.

My barrel has a 1:12" twist which works against higher muzzle speed compared to a slower twist barrel because of increased friction. I specified a 1:12" twist in order to stabilize the 310gr bullet.
 
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Slamfire said:
Pretty decent 35 Whelen performance. With a 24" 1:16" barrel 35 Whelen I've seen a bit over 2500 fps using 250gr bullets and a near maximum charge of Re15.

But lacks the efficiency of my 350 RM which will drive a 250gr bullet at 2800 fps with nearly the same amount of Re17 you are using and without compression. A sharper case shoulder coupled with shallow seating depth, generous throat length and a longer barrel will do that.
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Hell, if we don't need to post loads, I'm getting 2850 from my 35 Whelan using 250 gr bullets. But the load is secret and I can't tell you. Just take my word for it. Trust me. :)
 
67.0 gr Re17 / Hornady 250gr SP / Nosler Custom brass / Fed 215 = 2750 fps MV from my unique 1-of rifle only. And no others! Chrony was 7.5m from the muzzle so add ~30 fps to correct at the muzzle.

I can safely increase the charge a bit to get 2800 fps MV no problem. Accuracy effect unknown.

However, the lighter bullet loads aren't of primary interest. It's the near maximum 310gr load at 2465 fps MV.

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Possible with a long drop tube funnel kit, an MTM product. A bit of tapping on the case side helps too. With 200gr TSX bullets I safely got 3050 fps MV with a bit more powder. Fun and games.

350 RM / 200gr load data for comparison. Medium/medium fast burn rate powders used. Note shorter COL, and their barrel length is 26"

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This reminds me of a thread years ago where someone bought a NEW 243, then asked advice on reaming it Ackley to duplicate 6mm ballistics. That was a target rifle.

Hear we have the original short action ...short mag....in a long action. So losing the supposed 2 oz advantage of short action over long. Your numbers are pushing past factory 338wm.

There is a solution to this, it's called 358 Norma magnum.
 
nowarningshot said:
This reminds me of a thread years ago where someone bought a NEW 243, then asked advice on reaming it Ackley to duplicate 6mm ballistics. That was a target rifle.

Hear we have the original short action ...short mag....in a long action. So losing the supposed 2 oz advantage of short action over long. Your numbers are pushing past factory 338wm.

There is a solution to this, it's called 358 Norma magnum.
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No good reason to do it but then again no good reason not to. It's a hobby so it doesn't need to be practical.

But I am sceptical of the claim of getting more energy (velocity) due to cartridge design (short/fat/sharp shoulders). The increased velocity comes from increasing the case capacity by seating the bullet shallower, and of course the longer barrel. It's not "more efficient" than a 35 Whelan if you compare apples to apples. We all heard the claims of magic when the 300 WSM was new - more velocity for less propellant but they were all thoroughly debunked.
 
358 NM was considered for my high performance 35 caliber rifle project. However, Nosler data lists maximum 250gr bullet muzzle speed at only 2628 fps from a 24" 1:12" twist barrel.

https://load-data.nosler.com/load-data/358-norma-magnum/

Woodleigh data is a bit better at 2820 fps MV for their 250gr bullets. I'm already there with the 350 RM SI. Without the hassle of sourcing or forming 358 NM brass.

It's the 310gr that interests me. Woodleigh lists data for their 275gr bullet at 2750 fps maximum but not for the 310gr. So for the 310gr the 358 NM will likely do about 2500 fps MV. About the same as the 350 RM SI. High efficiency of the short magnum case.
 
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I got a Rem 660, with the pretty laminate stock, 350 mag, immaculate, from a collector auction.

Nice to know that there is a source of components, particularly for 350 mag brass. It took me 9 months to acquire dies, brass, projectile. Eventually I gave up and sold it.

The 358nm can't be worse than that, and brass should always be available for fireforming.

Really though, I guess for me the real point for me of my previous post was about reloading philosophy. My count of rifles is getting up there, rather than push individual calibers to max pressure and beyond, I simply reach for the next caliber once i find a accuracy node near max. My battery goes from 338wm(x2), 340 wea, 375 Rum, and 416 Rigby. So I already have choices for pushing 300 grain bullets above 3000 ft/sec. Sort of like the 6.5x55 vs 6.5 cm thread.....if you have one .....you don't need the other. Need is such a silly term on gunnutz.
 
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jethunter said:
No good reason to do it but then again no good reason not to. It's a hobby so it doesn't need to be practical.

But I am sceptical of the claim of getting more energy (velocity) due to cartridge design (short/fat/sharp shoulders). The increased velocity comes from increasing the case capacity by seating the bullet shallower, and of course the longer barrel. It's not "more efficient" than a 35 Whelan if you compare apples to apples. We all heard the claims of magic when the 300 WSM was new - more velocity for less propellant but they were all thoroughly debunked.
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Somewhere I have a Military Small Arms book from the 1970's, it had a whole chapter on rifle/machinegun cartridges including some "U" shaped cases. Other than functioning through autoloaders the conclusion was the old "there's no replacement for displacement".
 
MiG25 said:
Somewhere I have a Military Small Arms book from the 1970's, it had a whole chapter on rifle/machinegun cartridges including some "U" shaped cases. Other than functioning through autoloaders the conclusion was the old "there's no replacement for displacement".
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Yup. Expanding gases propel the bullet. More propellant = larger gas volume.
 
Extra bore size is advantageous with the short magnums as evident with the efficiency of my 350 RM. In the 7th edition of the Hornady Handbook they comment on the high efficiency of the 325 WSM. Ballistically right along side the 8mm RM and 8x68 S with less powder.
 
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High performance? I kinda like 2800 with 200's... plenty high enough, before jumping to the .375's...
 
Slamfire said:
Extra bore size is advantageous with the short magnums as evident with the efficiency of my 350 RM. In the 7th edition of the Hornady Handbook they comment on the high efficiency of the 325 WSM. Ballistically right along side the 8mm RM and 8x68 S with less powder.
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The same concept applies to any cartridge with larger bores in any size cartridge.

The 350 Rem Mag has almost died. It's a good little cartridge but wasn't special enough to survive, apparently.
 
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