7mm Rem. Mag. and 180 grn. Bergers???

dxlbaile

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Aug 8, 2015
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515
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New Mexico
Retumbo has been the magic for me 72.0 grains .050 off jam Berger 180 hybrid 3050 fps.. I fully trust the combo.
Start lower and work up to this load if your rifle is sammi.
 

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deweyduck

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Jun 27, 2013
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Location
Atlanta, GA
Since I'm the OP, I guess I'll chime back in. Tried the 180's with H1000 and could only get a little over 2800 fps. I tried Retumbo and had better velocities but my ES was terrible. The H1000 load was very accurate and consistent. Killed a whitetail at 597 yds with it. Went back to the 168's. H1000 fouled bad with the 168's, so I went to H4831. Just over 3000 fps and ES of 14 and same accuracy I was getting with the 180's. I figure what little I'm giving up in BC, I'm more then making up for in velocity. Used this load to kill an antelope at 916 yds.
Hello Jumpalot. This is old but you will prolly see it soon. So good shooting with the H4831 and 168's. That's what I shoot seated to zero jump but with 63.4 grs of H4831 to get 2.7" group at 300. Don't know the fps, no chrono, but what load are you shooting and your jump if you don't mind? I'm still tweaking my load and seating.
 
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Jumpalot

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Oct 3, 2005
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Wyoming
Hello Jumpalot. This is old but you will prolly see it soon. So good shooting with the H4831 and 168's. That's what I shoot seated to zero jump but with 63.4 grs of H4831 to get 2.7" group at 300. Don't know the fps, no chrono, but what load are you shooting and your jump if you don't mind? I'm still tweaking my load and seating
I don't have the 7 mag anymore, well I have the rifle, it was just rebarrelled to a different cartridge. What I think I learned about that barrel is that it just didn't build pressure the same as others. With the Retumbo and H1000, I got really bad powder fouling and almost couldn't get enough powder in the case to get any velocity. I ended up at 67 grains of H4831 which is quite a bit over max. I seated the bullets 20 thou off the lands. Shot really well with acceptable velocity.
 

deweyduck

Active Member
Joined
Jun 27, 2013
Messages
43
Location
Atlanta, GA
I don't have the 7 mag anymore, well I have the rifle, it was just rebarrelled to a different cartridge. What I think I learned about that barrel is that it just didn't build pressure the same as others. With the Retumbo and H1000, I got really bad powder fouling and almost couldn't get enough powder in the case to get any velocity. I ended up at 67 grains of H4831 which is quite a bit over max. I seated the bullets 20 thou off the lands. Shot really well with acceptable velocity.
Thank you sir. 67 grs is way higher than anything I've tested but i think I will do another round of testing with one shot? per .5 gr increase just to search for trouble.
 
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