Hornady 7mm 139 gmx data

[kman300]

I would like to start some load development with the 139gr gmx in the 7mm rem mag. I am unable to find any load data on their website but was told that you can use regular cup and core data as long as the weight matches.

Can anyone with a hornady reloading manual post their data for the 7mm rem mag and the 139gr sst? According to Steve Hornady I can use this same data with the 139gr gmx.

Interested in Retumbo, H1000, H4350 or H4381.

Thank you kindly.

 

[open-sights]

 

[kman300]

Thank you very much. Appreciate you taking the time.

 

[stubblejumper]

I haven't done much work with the GMX yet, but the other monometal bullets that I have developed loads with, showed pressure signs with slightly less powder that traditional cup and core bullets.

 

[kman300]

I will work up as usual and have noticed the same with tsx/ttsx. Hornady says their data is interchangeable between cup and core and their gmx.