bullet/powder suggestions for 375 RUM

[jeremiahgus]

I just picked up a 375 RUM and wanted to see what others around here are using for bullets and powder.
I had a 338 edge built and am having a 388 Lapua improved build and have been using the H1000 for a while on my last Lapua. I was thinking of using a 300gr or 350gr bullet for the RUM. I have not been reloading for a long time and its been a few years since I loaded for a 338 Lapua I had then. I was using h1000 with 300gr SMK and will probably use those or 300gr bergers for the edge but want something heavy and either a flat nose or round nose for the 375rum. I will be using the Rum for Grizzly and maybe a moose now and then.
Any suggestions on the bullets will be welcomed and if maybe I should go with a different powder with the RUM.

Thanks,
Jeremiah

 

[AKGuide]

H1000 will be a touch too slow for the 375 RUM for best velocities as most loads would be compressed, but it might work with the 350 matchkings if you seat them long. I would look into using H4350, H4831, R23, and imr7828 for your powders, but would lean towards H4831 as it is an extreme powder. Out of a 26" barrel you should be able to push the 300 grainers to 2800-2850 using these powders.

Reuben

 

[jeremiahgus]

Thanks for the reply Rueben. I do not have a lot of experience reloading and doing load workups yet so I really appreciate your input. I also do not have access to my reloading manuals and have read that the 375 rum doesnt even show up in a lot of them. I want to stay away from compressed loads if there is a viable option and it looks lime there will be in this case. Thanks.

 

[Thebear_78]

I've been using H414 with the nosler 260 accubond @ 3000fps. Great accuracy and nice and flat shooting. I have also loaded the 270 TSX with H414 and H4350. The 270 TSX is the bullet I would choose for coastal brown bears.

 

[Varmint Hunter]

Nosler data for the 260gr and 300gr bullets can be found here:

https://load-data.nosler.com/load-data/375-remington-ultra-magnum-rum/

 

[375ultramag]

I use the 260 grain Accubond and IMR 4350 loaded to fit the magazine and my rifle will shoot sub moa out to 400 yards, which is as far as I have taken it to so far.

 

[gunaddict]

I use Barnes 270 gr TSX with 99 grs of AA4350. Shoots great.