NEI/SSK 358 182/200 Grain

I received this mold today.(NEI/SSK 358 182 Grain and 200 Grain GC) 357 Magnum Can anyone point me in the direction of load data for these bullets? I know they were designed by JD Jones for handgun hunting but I'm not able able to find much more information. Thanks in advance. Boats

 

CZ93X62

Official forum enigma
I have done a LOT of shooting in 357 Magnum revolvers and one lever action rifle using 180-200grain bullets. These heavy-for-caliber weights really hit their stride in rifle barrels and in my Ruger Bisley Blackhawk's 7.5" barrel. In barrels shorter than 6" these heavier weights seem to lose some of their advantage over the 140-160 grainers common to 38 Special and 357 Magnum applications.

I would think any cast data for 180 and 200 grain cast bullets can be the basis for load work-ups. My loadings in 357 Magnum use WW-296 powder--CCI #550 primers--Starline brass in my S&W Model 686, Ruger BisHawk, and Henry Big Boy rifle. Lyman #358430 (195 grain RN) uses 12.4 grains of WW-296, and meets its Winchester 2004 data claims of 1200 FPS in the BisHawk. 13.5 grains is the charge with a 180 grain GC/FN design from a Lee Molds Group buy 20-odd years ago and runs about 1275-1300 FPS from the 'Hawk--It gives 1600 FPS or so from the Henry. Keep both of these loads OUT of K-frame or J-frame 357s!
 

358156 hp

At large, whereabouts unknown.
I almost bought that mould, but I decided I have enough heavy .357s for now. I'd probably use data from Lyman 358627 to get started with the 200 gr. 358627 is a bit heavier (215? gr), and the 296/H110 data probably wouldn't be appropriate, but it's a start anyway. 173 Keith starting loads might work okay for the 180 gr depending on the amount of case intrusion by the bullet base. It shouldn't be difficult to get this mould going.
 

Glaciers

Alaska Land of the Midnight Sun
I received this mold today.(NEI/SSK 358 182 Grain and 200 Grain GC) 357 Magnum Can anyone point me in the direction of load data for these bullets? I know they were designed by JD Jones for handgun hunting but I'm not able able to find much more information. Thanks in advance. Boats

Nice I have the 200 grain in a 2 cavity. Haven’t done much with it yet. Well it has been 40 years. I’m sure I’ll get to it. I do have the same Sledgehammer design in 44 - 310 which I use commonly. Unfortunately it’s just a touch long for my Browning 92.
that 182 looks like a perfect weight for a 357.
 

stubshaft

New Member
One of my all-time favorites for the 357 mag and maxi! In my 1894C in 357 mag. I use 12.5 296 behind it and in my T/C and Seville pistols I load it ahead of 20.0 296. That load has garnered me a number of State Silhouette Championships!
 

Ben

Moderator
Staff member
So I guess that your T/C and Seville pistols are chambered in 357 Max ? ?
 

CZ93X62

Official forum enigma
I have no experience with the 357 Maximum, but to paraphrase someone here whose handle is unrecalled--"There's no replacement for displacement"--meaning the boiler room. I've always thought the 357 Max would make a great lever action rifle cartridge that could conceivable handle 357 mag and 38 Special rounds as well, but that's just musing.

That said, I greatly love the 357 Magnum. Had my agency included the 357 Magnum to the caliber choices it authorized in 1987 when it added the 9 x 19 Parabellum and 45 ACP, it would have been a tough choice between changing ammo in my 4" 357s or re-equipping with the bottom-feeders. 357s didn't get added until 1994--only 60 years for that one to bubble up. At the same time (1994) my shop added the 40 S&W, which was 5 years old. Hey, I just worked there.

I'll steer this back into the thread's lane a bit now. The 357 needs a bit of barrel length to reap the benefits that the 180-200 bullets have to offer. In 2015 my old shop shifted gears with the 357 loadings from the 1994 load (W-W Super-X 158 grain JHP) to the Federal #357B--the 125 grain JHP that claims 1450 FPS on paper--it runs 1425-1435 FPS from my 4" 686, so 'Close enough for government work' methinks. The premise was that the old load wasn't showing expansion when fired from the J-frame 2" guns that most of the deputies were hauling around as back-up/off-duty disincentivizers, while the Federal 125s did. There is that barrel length aggravator--showing its teeth again, even for the Jello blasters.

My 357s have barrel lengths of 4", 6", 6.5", 7.5", and 18". My biases are obvious here--hunting and heavy-for caliber bullets.

One side-note before I stop hacking at you all......cylinder-to-forcing come gap makes a difference, too. My 4" 686 shoots all full-value loads 75-125 FPS faster than my pre-27 S&W N-frame x 6.5"--religiously. WTH? Short answer is that the 686's flash-gap is .004". while the pre-27's is .011" Yes, I have inquired about setting the barel back a turn and re-cutting the forcing cone--a couple gunsmiths I have queried have said 'Yeah, I'll do it, but I don't think the juice is worth the squeeze.' Nicely enough, my new Python x 6" has .003" flash gaps consistently. Yeah. there will be some chronography to test that premise out. Trust nothing--test everything. Trust NOTHING.
 
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Missionary

Well-Known Member
Saw an Issue with building a 414 Supermag in a 336 Marling that I did not expect. Getting feed issues due to a too short OAL. Got it fixed with 1st seating the 265 gr lead out to the lowest grease groove. But I wanted to still have a cartridge / rifle combo with the same ammo.
So added a spacer on the lifter "bullet stop" so the 414 SM load would be 1/2 the missing distance of the regular 30-30 round.
Coarse a single shot is a no issue... but we wanted a lever rifle in 414 SM.
Extra barrel length producers 250 -300 fps over the 8" Dan Wesson revolver with the same load.