.300 Rem Ultra Mag Load Suggestions

[effendude]

I have just picked up a can of Retumbo for my 300RUM Was not happy with H4831SC. Bullet of choice will be Barnes MRX and TSX, both 180,elk) and 165,deer). Rifle is a Rem XCR, Jewell trigger and HS stock. Looking for good accuracy while making the most out of the RUM case. Any load suggestions would be appreciated.
Thanks,
Scott

 

[billmo]

Scott, I have some good data from back when I was shooting the gun that kills on both ends but it does not include the Barnes bullets. I tried them in my rifle,as I did almost every rifle that I owned at the time I was working with them) Sorry, just could not get acceptable accuracy in nothing. I will be glad to look up the data that I have if you would like it. Just let me know. Bill

 

[mattdienes]

TRY 93 GR OF RL 25, 215M, 180 GR BARNES TSX.OUT OF A REM700 LSS 26" IT SHOT EXTREMELY WELL.,THIS IS WITH REM BRASS)

 

[Rodbolt]

RL25 with 200gr Nosler AccuBond seated in Remington brass is my best load in both 26" barrels.

 

[Rust]

After initial load developement with RL-25 and Winchester magnum primers in both .300 RUM and .338 RUM I decided not to waste my time or barrel life with further load developement using any other powder.

In .300 RUM, around 92.5 gr of RL-25 with a 180 gr jacketed bullet is right in the ballpark depending on how you seat them and the rest of the usual variables.

In .338 RUM around 89.5 gr of RL-25 with a 250 gr jacketed bullet seems to do the trick, a bit more with the 200 gr Nosler which ends up being a pretty good hunting load.