300 RUM powder choice?

[loaders_loft]

Looking for advice on a powder choice for a friend's 300 RUM.

I have 180grain ballistic tips and accubonds, with WLRM primers. Although I have several powders on hand, this HUNGRY cartridge limits me to only a few powders that I have over 1Lb on hand. These are:

H4831sc
H1000 (limited to only about 1.5Lbs)
Retumbo

Looking at the Nosler manual,

H4831 is relatively "slow", 3089-3205fps.

H1000 is also "slow", 3089-3225fps.

Retumbo is among the fastest velocity range, at 3204-3343fps.

However, Retumbo is 99-103% load density. (I do have a long funnel for these situations )

ps. Also have a box of 180gr TTSX, which will probably require a different load altogether... Input appreciated.

 

[KDB]

I have had good luck with retumbo pushing 190 VLD's. My max load is 98.5 grains of retumbo chronographed in the area of 3460. So far, no signs of pressure and last time I was at the range it was in the mid 90's. I have been waiting for VV N-570 to come in as I have had good luck with their high energy powders. Otherwise, the other powders you listed are too slow for me.

Trued Rem 700 w/ 28inch Krieger barrel

 

[bigbuck]

I have been trying h-1000 @ 200 yrds and kept them at 1'' that's a 3 shot group not to great so I decided to try some retumbo I loaded 85.5 grains of powder oal was 3.675 federal 215m primer topped with a 210 grain bullet my three shot group with it measured .318 you could cover them all up with a dime as for me that's the best i've ever shot on paper. temp. was 80 deg. last saturday morning.

 

[was21]

I've had some good luck with RL-25.
I don't have my load data handy at present , but give it a look.

FWIW
wes in AZ

 

[6.5x284tony]

I too have had great luck with RL-25. I have also tried Retumbo, H-4831SC, and H-1000, kept going back to the RL-25.

Tony.

 

[J E Custom]

There is another post on this site about the same thing and you may get some additional
information on it .

I like and use H 4831sc for the 300 RUM and the 30/378 and it performs well and is not as heat sensitive as some other powders.

The Retumbo can get a little wild at max loading for some reason and the H 1000 was very
nasty in My rifle (fouled badly).

The H 4831 has given the best overall performance with the 180 gr bullets in my 300 RUM
using Fed 215m primers.

My 2 cents worth

J E CUSTOM

 

[jbroadnax]

I have had great luck with IMR 7828 in the 300ultra. I was shooting 180AB's on top of 91grs of it. You certainly don't want to start with that load though.

 

[elkaholic]

I have two 300 rum's and have had the best results with retumbo and h870 (no longer available but thunderbird in ariz. has t870 which is the same thing) I loaded 105grs of h870 for 3350' with a 195 gr homemade ballistic tipped 8s spitzer with rebated boattail, .590 b.c. (180 accubonds would make 3550') With my 700 rem. and 27"" lilja 10 twist I get 3225' with 95 grs of retumbo. This is a good hunting choice as retumbo is less temp sensitive than most powders. If you are into long range, this makes a difference.
I have tryed about every slow burning powder available and 870 will always give top velocity! Good luck.........Rich

 

[Jon A]

For 173-220's Retumbo. For 220-290's, US869. That's all you need.