338 ultra mag reload help

[canyon]

I'm from Warrior, AL, and have many years of competitive shooting with my father.
However, I'm really struggling with accuracy issues with my 338 RUM. I have change the factory stock toa Mcmillian HTG. Also had a muzzle brake added. Im getting poor groups. I have Retumbo, h1000, h4350, h4831sc, rl22. Thanks for any reload info if you've got the data.

 

[ultraedge]

Canyon, We need more info, such as bullet type, primers, factory or custom barrel,magazine length,seating depth in relation to lands, etc. Will be glad to help. Call me at 478-957-5213 Gary Campbell

 

[royinidaho]

Depending on the make and model it could be selective regarding bullets. Give it a go with 300 grain offerings in SMK and/or Berger. Mine is so-so with 225s and 250s and outstanding with the 300s.

 

[captacademy]

My 338 RUM only likes the 225 TTSX and 250 smk's Retumbo for the Barnes and H-1000 for the SMK's. Fed 215 primers.