Magnum vs Grand

[golfer]

Has anyone who built a load with magnum tested data of that load vs Grand? After searching google they show they are next to each other on the burn chart. Are they interchangeable like people claim rl26 and n560 are?

 

[std7mag]

Has anyone who built a load with magnum tested data of that load vs Grand? After searching google they show they are next to each other on the burn chart. Are they interchangeable like people claim rl26 and n560 are?

Guessing Magnum reacts more like RL23 from what I've heard.

Grand is supposed to replicate H1000.

I'm doing fairly well with LRT.
Takes a heavier load than other powders that I've tried.
The 257 WBY loves it!!

 

[307flyguy]

I have some experience here. I developed a load for Magnum last year in 7PRC.
I was getting 2885 out of a standard barrel gen 2 Ruger with using 71 grains of Magnum, Nosler brass, Magnum Primers and 162 Eldx.

I finally had a chance to pick up some ADG brass this year, and decided to go with Grand because its supposed to be more temp stable.
With the thicker brass I needed 69 grains of Grand to get to the same velocity.