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Have had 2 .. a factory husky and a custom springfield ; both very accuratte with the factory 250's and recoiled less then the few .338's and .340 I owned

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Agree with RickF on the use of the 300WM cases. I had a custom reamer made up about 10 years ago that pushes the shoulder forward a bit and blows out the shoulder diameter to get max case capacity. Fair amount of trouble but I get 2800 fps with IMR4350 and 250 grain bullets from my 22" bbl. duplicating 358NM specs in a 24-25" bbl. The cases form easily on first firing with exact headspace and I can use the much cheaper 300WM cases. The rifle is 8 lbs with a 2-7x scope, no brake and kicks enough to get your attention, but easy to shoot off the bench when needed without discomfort. Great medium cartridge, very accurate. IMO you don't need a brake if you're used to shooting standard weight 375 class rifles.


Is life so dear, or peace so sweet, as to be purchased at the price of chains and slavery? Forbid it Almighty God! I know not what course others may take, but as for me, give me liberty of give me death! P. Henry

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Mine has a 23" barrel, and gets 2800 with 75 grains of IMR4350. Similar to yours?

Thanks.


Anybody who seriously concerns themselves with the adequacy of a Big 7mm for anything we hunt here short of brown bear, is a dufus. They are mostly making shidt up. Crunch! Nite-nite!

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Cool Rick, thats a damb good idea ill have to speak to my smith about it. Two more questions what kind optics are you using?, and what about A-square Brass compared to Norma brass?


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Originally Posted by RickF
Originally Posted by TJR
what kind of optics would you put on a 358 nm, ie: 1.5x6 3x9 2x7 ???


I run a VX-III 1.75-6X32 on mine, and it's perfect. But it hasn't escaped me that it lives on 4X. I would be just as happy with a straight 4X.


As for the scope, Leupold. See above.

Re brass, I haven't tried A=Square. Winchester 300Win brass is readily available, outstanding in quality, very tough and cheap. I can't imagine not using it.

I can't say the long necked Norma is any better than the standard, but it has attributes I like. If you are using a magnu length action, I can't think of a single reason not to go this way.

With that magnum action, you can also go with the 35 STA. But for me the Norma in an 8 pound rifle sans muzzle brake is enough. It shoots plenty flat enough and doesn't kill on both ends. It's a good cartridge.


Anybody who seriously concerns themselves with the adequacy of a Big 7mm for anything we hunt here short of brown bear, is a dufus. They are mostly making shidt up. Crunch! Nite-nite!

Stolen from an erudite CF member.
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Originally Posted by RickF
It's a good cartridge.
Not to mention that it's a bit different and FUN!!

I've built one for a customer.. Not at all bad to shoot, but maybe it's because I'm fairly used to magnums.. I built a .358STA also and found it to be not unpleasant to shoot..


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The case capacity on my wildcat case is 95 grains (to the shoulder) so it takes about 5 more grains if IMR 4350 to generate 2800 fps. I haven't tried slower powders, but think that because of the increased case capacity over the basic 358NM case (~84 grains) that may increase MV.


Is life so dear, or peace so sweet, as to be purchased at the price of chains and slavery? Forbid it Almighty God! I know not what course others may take, but as for me, give me liberty of give me death! P. Henry

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I expect it would. With the long neck, my rifle is somewhere in the middle. COL runs about 3.5", which definitely increases case capacity over the 3.34" cartridge.

Mine is topping out with the 250 grain bullet and IMR4350 at 2800 fps. One grain increments from 70-75 grains gives an extra 50 fps or so, quite a linear increase. But once I get to 75 grains, the increase with increasingly larger charges drops to 15-20 fps.

I have settled on the 225TSX and Ramshot Big Game however. 73 grains clocks 2950 with very consistent velocities at widely varying temperatures. Accuracy is outstanding.



Anybody who seriously concerns themselves with the adequacy of a Big 7mm for anything we hunt here short of brown bear, is a dufus. They are mostly making shidt up. Crunch! Nite-nite!

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I've observed the same effect with IMR4350, with flattening of the MV slope starting at 78 gns. Just noted in my reloading notes that with RL-19 the MVs are ~ 200 fps lower when compared to equal weights of IMR4350. So I guess I have some work to do with a fairly narrow range of burning rates between the 2 powders. Should be an interesting Summer with the chrono.


Is life so dear, or peace so sweet, as to be purchased at the price of chains and slavery? Forbid it Almighty God! I know not what course others may take, but as for me, give me liberty of give me death! P. Henry

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Insome cartridges, RL 19 can behave pretty "slow".I've noticed this with the 30/06.Not surprsed it does this in the 35's as well.




The 280 Remington is overbore.

The 7 Rem Mag is over bore.
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Originally Posted by Wildcatter264
I've observed the same effect with IMR4350, with flattening of the MV slope starting at 78 gns. Just noted in my reloading notes that with RL-19 the MVs are ~ 200 fps lower when compared to equal weights of IMR4350. So I guess I have some work to do with a fairly narrow range of burning rates between the 2 powders. Should be an interesting Summer with the chrono.


I found exactly the same thing in my Norma with RL15 and 225 grainers. Big Game beats it by at least 200 fps.


Anybody who seriously concerns themselves with the adequacy of a Big 7mm for anything we hunt here short of brown bear, is a dufus. They are mostly making shidt up. Crunch! Nite-nite!

Stolen from an erudite CF member.
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