Has anyone tried us869 powder

Friend has had 3 30-378 s over last 14-15 years. I always loaded for him. With 165-180 gr bullets Retumbo was fantastic. Great velocity ( like Weatherby factory loads) and all 3 rifles shot 3/4 moa without a bunch of load development.

Heavier pills and then us869, R33, etc burn rates might keep pressures down.
 
You are right about that. Another very similar powder to Retumbo would be imr8133. It's supposedly near same burn rate and temp insensitive also.

Probably tough to find too but since it's not been around as long maybe a little easier.
Good Luck
 
You are right about that. Another very similar powder to Retumbo would be imr8133. It's supposedly near same burn rate and temp insensitive also.

Probably tough to find too but since it's not been around as long maybe a little easier.
Good Luck
98.5 grains 8133 and coal 3.770 shoots .315 in mine
 

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