Load Development 7mm Rem Mag Berger 195 Extreme Outer Limits (EOL)

[jdmecomber]

No adapater, this camera has 83x optical zoom

Pm me and I can try to get you some videos. It's impressive.

 

[jdmecomber]

I ended up having to work up a new load due to changing brass.

My old load as 63.7 gr of RL26 in PPU brass shooting 180 ELD M. Brass started to show case head separation. It also had a terrible capacity. It produced 2890ish FPS.

Went to Win brass. Final load was 68.5 of RL26 at 3015 with a SD of 3.3 and ES of 7. I pushed it to 70gr with no pressure signs but SD was in the teens. Tried retumbo again, but terrible SD and ES with same speeds. RL26 seems to be the ticket in this rifle.

I am going to have to give up on this 195 out of the 7 mag. The high pressures are giving me some inconsistency that I don't like. I went out to reconfirm my zero and had some pressure signs and a couple flyers. A lot of work down the tubes. I will switch to the 180 vld.

 

[MudRunner2005]

No adaptor, this camera has 83x optical zoom

Holy crap! What might something like that cost?

 

[MudRunner2005]

I am going to have to give up on this 195 out of the 7 mag. The high pressures are giving me some inconsistency that I don't like. I went out to reconfirm my zero and had some pressure signs and a couple flyers. A lot of work down the tubes. I will switch to the 180 vld.

Before you give up, try a slower powder... IMR 7977 or Hodgdon H1000 should work nicely.

 

[jdmecomber]

Holy crap! What might something like that cost?

599$

 

[Bstick]

I am going to have to give up on this 195 out of the 7 mag. The high pressures are giving me some inconsistency that I don't like. I went out to reconfirm my zero and had some pressure signs and a couple flyers. A lot of work down the tubes. I will switch to the 180 vld.

You need to try a new powder.

RL26, RL33, N570, H1000, 7828 are all good choices.

 

[jdmecomber]

You need to try a new powder.

RL26, RL33, N570, H1000, 7828 are all good choices.

I think the 7 Rem Mag is trying to do too much with the 195, alright one more powder. Then I am saving the rest of my barrel for a bullet more optimal for the caliber. H1000 it will be

 

[Bstick]

I think the 7 Rem Mag is trying to do too much with the 195, alright one more powder. Then I am saving the rest of my barrel for a bullet more optimal for the caliber. H1000 it will be

The 7 rem mag is plenty capable of pushing the 195 to 2950-3000 out of a 28" barrel. For that to happen you need a really slow burning powder and a 1:8 twist barrel. I have never had any luck with retumbo and low SD/ES. Plenty of speed just no consistency.

Send me the rest of the 195s when you done.

 

[jdmecomber]

Y

The 7 rem mag is plenty capable of pushing the 195 to 2950-3000 out of a 28" barrel. For that to happen you need a really slow burning powder and a 1:8 twist barrel. I have never had any luck with retumbo and low SD/ES. Plenty of speed just no consistency.

Send me the rest of the 195s when you done.

Your first on the list

 

[jdmecomber]

Well
Back at it with the 195 and the 7 Mag. I noticed that only after a few firings this Winchester brass is getting lose primer pockets.

I gave another powder a try with 5 rounds.
IMR 7828SSC showing some great promise.

Here is a .462 5 shot with 7828 SSC first time down the tube.

 

[scdogman]

What was the speed with 7828?

Also I think you are playing with fire. Be safe. I'm pushing the 195s with 78.4 grains of Retumbo in a 28 Nosler around 3012 FPS. You are asking a lot from the 7mm. I would ask someone with quickload to run numbers, but you might be over pressure.


QUOTE="jdmecomber, post: 1419807, member: 94549"]Well
Back at it with the 195 and the 7 Mag. I noticed that only after a few firings this Winchester brass is getting lose primer pockets.

I gave another powder a try with 5 rounds.
IMR 7828SSC showing some great promise.

Here is a .462 5 shot with 7828 SSC first time down the tube.[/QUOTE]

 

[jdmecomber]

What was the speed with 7828?

Also I think you are playing with fire. Be safe. I'm pushing the 195s with 78.4 grains of Retumbo in a 28 Nosler around 3012 FPS. You are asking a lot from the 7mm. I would ask someone with quickload to run numbers, but you might be over pressure.


QUOTE="jdmecomber, post: 1419807, member: 94549"]Well
Back at it with the 195 and the 7 Mag. I noticed that only after a few firings this Winchester brass is getting lose primer pockets.

I gave another powder a try with 5 rounds.
IMR 7828SSC showing some great promise.

Here is a .462 5 shot with 7828 SSC first time down the tube.

[/QUOTE]



I agree with you. It's a lot for the 7 mag. I have high pressure and inconsistency with the bullet not being optimized. The brass is also not lasted very long. I haven't checked the speed of this 7828 yet. It was lower then the max from the Berger book.

 

[Bstick]

What was the speed with 7828?

Also I think you are playing with fire. Be safe. I'm pushing the 195s with 78.4 grains of Retumbo in a 28 Nosler around 3012 FPS. You are asking a lot from the 7mm. I would ask someone with quickload to run numbers, but you might be over pressure.


QUOTE="jdmecomber, post: 1419807, member: 94549"]Well
Back at it with the 195 and the 7 Mag. I noticed that only after a few firings this Winchester brass is getting lose primer pockets.

I gave another powder a try with 5 rounds.
IMR 7828SSC showing some great promise.

Here is a .462 5 shot with 7828 SSC first time down the tube.

[/QUOTE]

My barrel should be finished up in the next couple weeks. He is a little behind I guess. I am pushing the 180s at 3041 suppressed and 3015 unsuppressed. 28" barrel. Maybe I am crazy but I don't have any pressure signs yet. I am hoping to see 2950 with the 195s.

 

[jdmecomber]

My barrel should be finished up in the next couple weeks. He is a little behind I guess. I am pushing the 180s at 3041 suppressed and 3015 unsuppressed. 28" barrel. Maybe I am crazy but I don't have any pressure signs yet. I am hoping to see 2950 with the 195s.[/QUOTE]

When I was pushing the 195 with retumbo, I didn't realize it at the time, but it was ruining the primer pockets pretty quick.

Anybody use a belted mag collet die?