I have done a limited amount of casting for my air rifles, from .257 to .357 cal.... and I started with pure lead from RotoMetals.... I was told to add 1% tin to get better filling, and indeed that worked well.... I want to maintain the softest possible bullet because of the limited pressure available for propulsion, and the velocity, which is always under 1000 fps.... I need to purchase more lead soon, and I see that I can get 1:40 Alloy from RotoMetals (2.5% tin) which has a BHN of 8.5....

My first question is, what would be the BHN of pure lead, and of my 1% alloy I currently use?.... My second question is, what is the optimum tin content for my purpose to get the best filling while maintaining the softest possible bullet?.... This is my first thread here, so please be gentle!....

Bob