What about this?

[ChestnutLouie]

I was looking at the Roto Metals site and saw this. What does trace amounts of copper and iron do to bullet alloy? Can this be used to make WW into a suitable rifle alloy?

Thanks
Francis

 

[Rick]

WW is a suitable rifle alloy. I use CWW +2% Sn in all my rifles to about 2,000 fps. Air cooled.

 

[fiver]

copper good, iron floats to the top.
it floats faster with a little help from some carbon, or sulpher.

 

[Bret4207]

I think a lot of the dross people using cast/steel pots get is just rust.

 

[CZ93X62]

I was gifted about 100# of foundry type 30 years ago. I added it 1 part to 5 parts of unalloyed lead, and got real close to Taracorp/Hardball alloy hardness (14-15 BHN) for rifle and Magnum revolver bullets. That 100# lasted about 25 years. It didn't produce any more dross and crud than any other casting alloy. I have found that harder alloys seem less prone to feeding stoppages in older autopistols not designed to run JHP or cast bullets. FWIW. Hardness will not reduce or prevent barrel leading in and of itself, if that is your goal--bullets fit well in the cylinder's or barrel's throats prevent leading. Also make sure that your case necks aren't so small that they reduce bullet diameter and therefor induce barrel leading via too-small bullets. Bullet hardness might prevent leading only because a harder bullet is less likely to be sized down during seating into a too-small case neck.

 

[Winelover]

When I make 20-1 alloy from scratch. I use 20# of RotoMetals pure and add one full 1# roll of 95-5 plumbing solder. There are trace amounts of copper and silver in that solder. Works for me. BHN measured on a LBT tester is 8-9......after three weeks.