7mmRM 175 Part Grand

[Bruce Mc]

Got out today to try Grand with 175 Partition in 7mm Rem Mag. Ran out six rounds to look at velocity and pressure signs. Hodgdon shows 72.2 gr as max at 3024 fps.

Rifle Mod 70 Win 26"barrel
Winchester brass
CCI 250 primer
3.342 OAL

71.0 2965 fps
71.3 2980 fps
71.6 3022 fps
71.9 3060 fps
72.2 3055 fps
72.5 3062 fps

The entire group was around 2". The last three were a tad over 1/2". There were no pressure signs so I'm not convinced that the 72.2 is a max load. There may be a sweet spot right around it though.

#### I have a typo in the first paragraph, Hodgdons data show max load 72.2 gr for 2940 fps.

 

[RL338]

I agree with exploring the 72.2 grains.

 

[wildman]

Got out today to try Grand with 175 Partition in 7mm Rem Mag. Ran out six rounds to look at velocity and pressure signs. Hodgdon shows 72.2 gr as max at 3024 fps.

Rifle Mod 70 Win 26"barrel
Winchester brass
CCI 250 primer
3.342 OAL

71.0 2965 fps
71.3 2980 fps
71.6 3022 fps
71.9 3060 fps
72.2 3055 fps
72.5 3062 fps

The entire group was around 2". The last three were a tad over 1/2". There were no pressure signs so I'm not convinced that the 72.2 is a max load. There may be a sweet spot right around it though.

How much case capacity do you have left @72.2 ?

 

[SJB358]

That’s hauling bass Bruce! God, if you could make it shoot around 3k that’s pretty danged cool. I need to try some of that stuff.

 

[Bruce Mc]

I sure wish the Ramshot Grand profile was available in quick load. I'd like to see the pressure estimates on these loads.

 

[SJB358]

Wonder if it’ll be in the latest update?

 

[Charlie-NY]

I sure wish the Ramshot Grand profile was available in quick load. I'd like to see the pressure estimates on these loads.

Ramshot Grand and Ramshot Magnum seem to have the same burn rate. That might be a good place to start.