150gr gameking 7 rem mag

[Thompsonj]

Going to start with these in a 7 mag I have. What's your go to powder for this grain?

 

[Idaho Lefty]

IMR 7828 "worked" real well for me, back when, I had a 7mm Rem Mag with, 154 Gr Horn. InterBonds.
65.7 grs, got me, 3065 - 3,070 FPS with,.. great, accuracy (26" bbl ).
Higher charges, resulted in groups "opening",.. Check Sierra Data as, the Bullet IS,. "different" ( Bearing Surf. length and Copper composition ! ).
Good Luck,.. start LOWER and work upwards, as Pressure indicates !
Sierra GK's, ARE,. accurate and EZ to Tune !

 

[Thompsonj]

I ran some with H4831SC, didn't get results i was looking for. Thinking about trying some H1000 and see what happens

 

[Idaho Lefty]

7828 is slightly "Faster" Burning than, H 4831and shot great, in BOTH, a 7mm Rem Mag and .270 WSM for,.. me .
3/4 MOA in the 7 mag. and Sub 1/2 MOA, in the .270 WSM with, Berger 140 gr. Classic Hunters.
Not sure if, the H-1000 is any better than, H-4831 ( Both, are SLOW burning powders ! ) But, try it !

 

[Thompsonj]

I had to look at me sheet again, I didn't get great results with H4350. I do have 4831sc and H1000 I can experiment with