Powder suggestion for 200g in 338 RUM

Just a hunter

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Joined
Dec 4, 2019
Messages
77
Location
NC
Hello everyone. I just bought a 338 Rum and am needing advice. I want to shoot a 200 grain SST in it and have zero experience loading for the RUM's and limited knowledge loading anything. I have had good results with Reloder 22 in a 300 WM and IMR4831 in a 280. The Speer and Hornady manuals I have both say RL22 is good for the 338 but I don't have enough to even start trying to develop a load with and can't find any to buy. Is there another powder that you would recommend that I try to find for that caliber and bullet combo?

I hunt in NC and have zero need for the 338 RUM but I wanted one for years so that was need enough. I realize the cartridge wasn't necessarily developed for lighter weight bullets but for the hunting I do I think it will do fine.

Thanks for any help you can give me.
 

Varmint Hunter

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Joined
Dec 26, 2001
Messages
4,425
Location
Long Island, New York
338 Rem Ultra

Case:Remington
Twist:1:10.000"
Primer:Remington 9 1/2M, Large Rifle Magnum
Barrel Length:24.000"
Trim Length:2.750"

BULLET WEIGHT
200 GR. SPR SP

Starting LoadMaximum Loads
ManufacturerPowderBullet Diam.C.O.LGrs.Vel. (ft/s)PressureGrs.Vel. (ft/s)Pressure
HodgdonH1000BUY NOW0.338"3.590"96.02,94448,300 PSI102.0C3,12758,600 PSI
HodgdonH414BUY NOW0.338"3.590"79.02,95656,500 PSI84.03,08963,100 PSI
HodgdonH4350BUY NOW0.338"3.590"84.03,01155,400 PSI89.53,15663,000 PSI
HodgdonH4831BUY NOW0.338"3.590"91.02,97954,500 PSI96.53,13863,000 PSI
HodgdonHybrid 100VBUY NOW0.338"3.590"79.02,91452,600 PSI86.03,12663,100 PSI
IMRIMR 4350BUY NOW0.338"3.590"82.02,94052,200 PSI88.03,14962,100 PSI
IMRIMR 4831BUY NOW0.338"3.590"84.02,97152,200 PSI90.53,18662,200 PSI
IMRIMR 7828BUY NOW0.338"3.590"87.02,93052,900 PSI93.73,13662,500 PSI
WinchesterSupreme 780BUY NOW0.338"3.590"90.23,07054,700 PSI96.03,22263,200 PSI
 

MagnumManiac

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Joined
Feb 25, 2008
Messages
3,981
Powders I would recommend are those in this range:
RE25/H1000/Retumbo/N560/N160.
Faster powders work, but you will be losing speed and performance.

Cheers.
 

MagnumManiac

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Joined
Feb 25, 2008
Messages
3,981
Thank you for the reply. I'm trying to learn and appreciate any and all the help I can get.
You’re welcome, and greetings from Down Under.
The RUMS like running near max, best accuracy is always found running bullets fast too. I found this out recently also with my new 7STW. Middle loads were terrible.

Cheers.
 

jessej

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Joined
Apr 14, 2010
Messages
331
Location
Misipi
F4ACE998-6473-4B7D-850F-C5B3BFECAFD8.png
 

Hela52

Well-Known Member
LRH Team Member
Joined
Jan 4, 2021
Messages
121
Location
Wyoming
Reloder 26 (if you can find some) works great for 210 & 225 grain pills. I assume it would do the same for your 200's.
 

bozoben

Well-Known Member
Joined
Nov 16, 2015
Messages
82
338 RUM

remington brass
cci 250 primer
96 grains of retumbo
200 grain sst
26" 10 twist barrel
3020 fps

Previously I was at 101.5 grains of retumbo pushing it just over 3400
 
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