Staball Hd 7wsm

[Ice-kub]

Nothing is listed anywhere I can find on the interwebs.

Trying to figure out a starting load for staball Hd in a 7wsm

Cross referenced max loads of comparable powders for both the 7RM and the 7 wsm in the hornady and nosler reloading manuals and found that the wsm has about a 4.5% larger charge weight than the 7RM of a given powder.

Would it be "wise" to use a 7RM max charge plus 4.5% then reduce by 10% as a starting charge for staball Hd?

How do other go about determining starting charge weight for a powder not listed for your desired cartridge?

 

[ropeup79]

Hodgdon has 270 wsm info for staball HD. You should be able extrapolate carefully.

 

[Ice-kub]

Seems to be about on par with the hillbilly math I did comparing the wsm to the RM.

Thanks for the info

 

[A382DWDZQ]

*edit - Sorry, I was looking at 270 WSM.
There is some in the 2023 Hodgdon manual page 20 and online at

Reloading Data Center

www.hodgdonreloading.com

 

[Mike D Texas]

I worked up a pressure test on a 6.5 SAUM started mid charge for a 6.5 PRC and worked from 57 up to 66 grains of power using a 144LRHT. Never hit pressure and at 66 grains velocity was 2989 with a 20” barrel.

Mine is throated long for the Berger 156 EOL, so COAL with this load was 3.113”.

May give you some kind of starting point.


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[Ice-kub]

I worked up a pressure test on a 6.5 SAUM started mid charge for a 6.5 PRC and worked from 57 up to 66 grains of power using a 144LRHT. Never hit pressure and at 66 grains velocity was 2989 with a 20” barrel.

Mine is throated long for the Berger 156 EOL, so COAL with this load was 3.113”.

May give you some kind of starting point.


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Thanks for the input, I was thinking about starting at 60gr. I'll drop it back a couple more, the 175 has a good bit of bearing surface. I'm also running it in a long action rem 700 so I have it seated with boat tail junction at base of neck and shoulder junction.

 

[BassNBrass]

Wondering if anyone has more input on this, looking into running 180eldms and staball hd but not having much luck finding any information. long throated chamber in a tikka

 

[Tahoe1305]

Do this for the team. I’m new to staball HD too and hoping it will work in a wsm. Although I just snagged 14lbs of RL26.

 

[Ice-kub]

Ill double check my notes but I think I got to 69gr before pressure with a 175 berger elite hunter

 

[BassNBrass]

local shop has either staball or h1000 and the staball is cheaper by a good bit so hoping that will work haha. and thanks ice looking forward to your results.

 

[Ice-kub]

local shop has either staball or h1000 and the staball is cheaper by a good bit so hoping that will work haha. and thanks ice looking forward to your results.

Ran one of of each powder charge from 61-71 gr. Found pressure at 72gr on a later trip.
175 berger elite, fed once fired brass, fed lrm primers, seated boat tail at neck/shoulder junction.

 

[Tahoe1305]

Ran one of of each powder charge from 61-71 gr. Found pressure at 72gr on a later trip.
175 berger elite, fed once fired brass, fed lrm primers, seated boat tail at neck/shoulder junction.

Those are impressive speeds if the barrel length “normal” range. What is it?

Btw apologies on my earlier post didn’t realize you were digging into it 6 months ago. Glad you have the data now though.

My RL26 load (20” and similar velocity with 175eldx) is 65g and loaded long 2.98” OAL.

 

[Ice-kub]

Those are impressive speeds if the barrel length “normal” range. What is it?

Btw apologies on my earlier post didn’t realize you were digging into it 6 months ago. Glad you have the data now though.

My RL26 load (20” and similar velocity with 175eldx) is 65g and loaded long 2.98” OAL.

It's a 23" barrel, didn't have time to work up an actual load, but it was right on par with h1000

 

[BassNBrass]

I'm going to run a ladder to mirror what Ice-kub did and will post my results as well going to be in a 24" barrel on my end CCI magnum primers.

 

[Bleeb]

According to the GRT Discord-obtained Staball HD powder profile, and plugging it into a 7mm WSM with a 22" barrel and 175gr EH, I get a charge of about 67.5 grains at 62,846psi, giving 2727fps. 63 grains will put you at 50K psi.

NOTE: I have not used the Staball HD powder profile enough with my 7 PRC to confirm its accuracy, but my confirmed max load of 71.1gr with a 175 ELD-X in my rifle is pretty close to the max pressure indicated on GRT. However, I and getting more velocity than GRT indicates.