Help with 143gr Hammer Hunters in 7 rem mag

[cb4128]

I decided to give the 143gr Hammer Hunters in my custom 7 Rem Mag and today finally got a chance to shoot them at the range for a pressure test.

Maybe the H1000 I have and tried on this trip is not the right powder? These speeds were pretty surprisingly slow, although all 8 shots were in the same hole, loaded at .020 off the lands...

Components:

new Peterson brass, 215m primers, H1000 and the 143gr hammer hunter .020 off the lands (COAL is 3.370" in my rifle)

67.0- 2,951
67.5-2,938
68.0- 2,951
68.5- 2,943
69.0- 2,996
69.5- 2,996
70.0- 3,030
70.5- 3,048

* I do have a 22" barrel but I still feel like I'm really slow compared to the data I looked at in one of the hammer load data uploads on the forum.

For reference, also with H1000, I was able to get up to 69.5gr H1000 in the same brass with 180gr Berger hybrids at 2,890 fps and no pressure.

I also have the following powders I could try if they're more suitable for the 143's:

RL26
VV N560
VV N565
IMR 7828 ssc
H4831sc
H4350

Thanks for any help either way guys!

 

[Ucsdryder]

My buddy shot 143 out of his 7saum and they were SLOW. I want to say he hit pressure around 2900 with h4350.

 

[2buffalo]

Did you hit pressure?

 

[cb4128]

Did not hit pressure, but I have to be a couple of grains from it based on other loads...

Got some feedback from the Hammer bullets contact and I'm going to try N560 and see how it does

 

[CaptDru]

I'm using 68.7gr of RL23 and I am getting 3260fps. Try using RL26.

 

[GLTaylor]

cb4128,
H 1000 is way too slow. Go to Hammer Hunter Load Data on this Forum
Most are getting around 3200+ with your combo. Enjoy!

 

[cb4128]

ah ok very cool, thanks for the info

 

[Hard rock]

I'm using 68.7gr of RL23 and I am getting 3260fps. Try using RL26.

N560 will be neck and neck with R26 , or close too it . N565 might work too especially if it were a 26 in barrel.

 

[257Tony]

Yes H1000 is too slow for that combo. I'm using H1000 with the 143 HH in my 28 Nosler with great success. I'd try the 4831SC

 

[2buffalo]

Yes H1000 is too slow for that combo. I'm using H1000 with the 143 HH in my 28 Nosler with great success. I'd try the 4831SC

What's your load with H1000 if you don't mind me asking?

 

[GLTaylor]

cb4128,
Please share all of your load, rifle, bbl, twist, oal, etc. I'll post it as a reference for others.

 

[ButterBean]

cb4128,
H 1000 is way too slow. Go to Hammer Hunter Load Data on this Forum
Most are getting around 3200+ with your combo. Enjoy!

Way to slow is an understatement

 

[cb4128]

Way to slow is an understatement

So H4831sc or RL26? What's "ideal"

 

[ButterBean]

Something in the H4350 burn rate is where you need to be