well, I'm busy throwing around a 35 whelen, and cant but wish there was something akin to a necked-up 338winmag in 358... or even a little heavier.

has anyone developed anything like this???

Try the 358 STA{8mm rem. mag. expanded to 35}or the 375 rum necked to 35

Look at this thread for another view point on a big cased 358.



http://www.accuratereloading.com/ubbthreads/showflat.php?Cat=&Number=510565&page=0&view=collapsed&sb=5&o=14&fpart=1



I will be running M43 trials next week, weather permitting. The range is snowed in now!!!!

There's also the 358-378 Real Guns. Put the name into search engine, Real Guns website has info about it. Insane.
Mine already busts my shoulder hard, and I haven't even taken delivery of it yet!

358/378 data

http://www.realguns.com/loads/358378.htm

The fellow Joe who runs the site has already had the Clymer reamer made and dies done. Buy a cheap used 30/378 Synthetic and you are up an running with ease

Mike

To answer the original question: the .338 Win Mag necked up to .35 is basically the .358 Norma Mag.

i have seen the 35/378 shot. it was not pretty. the guy took his brake off to shoot for some stupid reason. knocked him of the bench i cant imagine wanting more after this one. my smith has the reamer and has made a few of them. i think one of the trgs sakos would be the cheapest way to start as the bolt face and rails are ready to go. just need a barrel. the savage might work also as they did chamber in the lazz. good luck and buy a past recoil pad for your shoulder
woofer

So, yeah, there's some big 35's.
They've been made off a lengthened '06, the 300 Win, the 300 WSM, 348 Win (same as 300 WSM), the 8mm Rem, the 375 Dakota (2.5" 404J), 404 Jeffery, 300 RUM, and 378 Wb.
About all that hasn't been done is the Rigby (same as 378), and then a 2.5" version of it. Not sure if Tooley has a 35 version, but he's done a bunch of wildcats on the 8x68mm case, and they seem to do quite well.
There's some improved '06's out there (Hawk, Howell) that really give that Whelen a taste of the magnum lifestyle. These would seem the easiest, in terms of converting a 35 Whelen. No boltface mods, little if any feeding issues.
Just take a look at the bullets available, and figure how fast you want them to go, then you can figure your case capacity vs gun weight vs bb length vs operating pressures vs recoil v muzzle blast. (Did I miss anything?)
I chose the full-length Jeffery mostly b/c I didn't want a belt (STA), and I couldn't bear not using the full length of the action. The case is big enough that I don't need to worry about maxing it out, like I know would happen if I got the Norma - my problem, NOT the Norma's!

A 358 Norma will rock in a 26" bbl, like better than 225/2900 and 250/2800, and brass can be made from numerous sources when factory is unavailable. In an 8# rifle the recoil is what I'd call plenty.
358 Norma is a goodun.

That said, don't be shy about making your own. Total extra cost is about $350 for reamer and dies, and I believe John Ricks has a standing offer to split the cost of wildcat reamers and he keeps it for you. Make that $275.
Obtain a good supply of 280 Ross cases and improve the hell out of them. Give it the same shoulde/neck as the STA and at 3.5" COL you'll beat it. At 3 1/3" you're nipping on it's heels.
Of course, resale value of a wildcat is pretty low in most cases, especially if it doesn't somehow "beat" what's out there. Just depends on what you want to do.

Yes! I've designed, built and have been shooting it since "99". 35caliber on the.404 case Improved And I do use a home made compensator and recoil pad. I have safley pushed a 250 gr PSP to 3150 ft/sec.I've been experimenting with lead bullets up to 300 Grains with a small measure of gratification. It's a fun toy. roger

Hey, Roger, what's the latest word on those heavy cast bullets. You done much load development? My case won't be nearly as lead-friendly to the heavies as yours should be with that long neck.

dasMafia, i have a .35 Griffin & Howe Imp.(.358STA) and a buddy of mine was impressed with my 9.3 Dakota round and made what he calls a .35 Sledgehammer. Both are 375 Dakota cases necked down. Both of these will push 250's at over 3050fps with ease. Hornady made dies for him. Very simple wildcats, no muss or fuss. Just neck down and shoot

a 358x338 winmag is exactly a 358 norma mag. and a fine round.

Zhat made/makes a 35 RUM, which is the 404 improved.

jeffe

Charles Newton did it a century ago. His rifles had steel "rifle" butt plates. That cartridge would shoot a 250 gr Hornady about the same speed as a .375 HH would push a 270 gr. I have chronograph data on that.

About a year ago, I had it in my head to do a .358 on the Rigby case. Lots of room for powder and about any velocity you want there. I got distracted by some other projects in .338, so I haven't done anything more with it than creating the cartridge/chamber drawing. I don't like belted brass, so I didn't want to go with the 378 Wby case as the base for it. maxman

The first 300 grainers hit paper at 100 yds. but I didn't have a chronagraph going and me thinks they came out a little too fast Next week I set up the new Ohler and we'll give some cast bullets of varying weights a try.
Charles Newton was just too far ahead of his time. The raw number of interested shooters was minimum, dollars were not as abundant as they are today and his ability to capture a resonable market share didn't exist ( No mass communication as you're looking at right now). Newton, no doubt, was truely a technically superior, straight forward,ORIGINAL cartridge designer. In my not too humble opinion it was a case of the "best" not being recognized and accepted by the masses. roger