Powder suggestion for 200g in 338 RUM

[Just a hunter]

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]

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 Load		Maximum Loads
	Manufacturer	Powder		Bullet Diam.	C.O.L		Grs.	Vel. (ft/s)	Pressure		Grs.	Vel. (ft/s)	Pressure
	Hodgdon	H1000	BUY NOW	0.338"	3.590"		96.0	2,944	48,300 PSI		102.0C	3,127	58,600 PSI
	Hodgdon	H414	BUY NOW	0.338"	3.590"		79.0	2,956	56,500 PSI		84.0	3,089	63,100 PSI
	Hodgdon	H4350	BUY NOW	0.338"	3.590"		84.0	3,011	55,400 PSI		89.5	3,156	63,000 PSI
	Hodgdon	H4831	BUY NOW	0.338"	3.590"		91.0	2,979	54,500 PSI		96.5	3,138	63,000 PSI
	Hodgdon	Hybrid 100V	BUY NOW	0.338"	3.590"		79.0	2,914	52,600 PSI		86.0	3,126	63,100 PSI
	IMR	IMR 4350	BUY NOW	0.338"	3.590"		82.0	2,940	52,200 PSI		88.0	3,149	62,100 PSI
	IMR	IMR 4831	BUY NOW	0.338"	3.590"		84.0	2,971	52,200 PSI		90.5	3,186	62,200 PSI
	IMR	IMR 7828	BUY NOW	0.338"	3.590"		87.0	2,930	52,900 PSI		93.7	3,136	62,500 PSI
	Winchester	Supreme 780	BUY NOW	0.338"	3.590"		90.2	3,070	54,700 PSI		96.0	3,222	63,200 PSI

 

[Just a hunter]

Thank you for that. I'll check on some of those.

 

[MagnumManiac]

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.

 

[Just a hunter]

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.

Thank you for the reply. I'm trying to learn and appreciate any and all the help I can get.

 

[MagnumManiac]

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]

Reloader 22 is your friend in this cartridge

 

[Just a hunter]

I have had really good results with RL22 in the 300 WM but can't find any. Do you know of any anywhere?

 

[jessej]

 

[jessej]

Of course. Start a few grains less and work up

 

[Just a hunter]

Of course. Start a few grains less and work up

Thank you very much for that info. Actively searching for some powder.

 

[Hela52]

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.

 

[Just a hunter]

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.

I'll keep an eye out for it as well while I am searching.

 

[bozoben]

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