COW fire forming tips

[Equalizer]

I just traded for a 358 STA and brass is unobtanium. I did a little research and found I can use 375 H & H brass of which I have quite a bit. I have never fire formed cases. Could any of you guide me in the process? Any advice or tips regarding the COW method would be greatly appreciated. Thanks

 

[ButterBean]

I use 17g or so out of a LEE dipper of Unique fill the rest of the case with COW and cap off with Ivory soap, works great

 

[crystalgayleguy]

use 8mm rem mag brass or 7mm stw brass

 

[Equalizer]

I use 17g or so out of a LEE dipper of Unique fill the rest of the case with COW and cap off with Ivory soap, works great

Thank you sir!

use 8mm rem mag brass or 7mm stw Brass

Also unobtainable. (at least I haven't found any) I believe it would also need to be fire formed though I may be wrong about that.

 

[crystalgayleguy]

advertise in the classifieds section of this forum for some

 

[Equalizer]

Great idea... thanks for the suggestion!

 

[FEENIX]

I just traded for a 358 STA and brass is unobtanium. I did a little research and found I can use 375 H & H brass of which I have quite a bit. I have never fire formed cases. Could any of you guide me in the process? Any advice or tips regarding the COW method would be greatly appreciated. Thanks

My process (not set-up, except for the COW and powder dispenser set-up) is similar to this ...

 

[ButterBean]

My process (not set-up, except for the COW and powder dispenser set-up) is similar to this ...

I just use a powder funnel for the COW filling

 

[FEENIX]

I just use a powder funnel for the COW filling

Sometimes I prefer doing this part of the process (COW) in the comfort of my dining table. I have a different set-up for the normal process.

 

[ButterBean]

Sometimes I prefer doing this part of the process (COW) in the comfort of my dining table. I have a different set-up for the normal process.

View attachment 246433

Love the LEE Powder Measures

 

[FEENIX]

Love the LEE Powder Measures

I figure, for $26 each, why not.

 

[ButterBean]

I figure, for $26 each, why not.

IMO they work as good as anything on the market

 

[P7M13]

At the price and availability of primers, I think hydro-forming dies are looking better and better.

 

[FEENIX]

@Equalizer, you might (???) not have (maybe run a sizing die to reduce the .043" difference) to. It might (???) be worth a try. Whether you do the COW method or use a hydraulic forming dies, it might take a couple of firing off your rifle's chamber for brass to stabilize.

Good luck!