The Hornady round balls I have been shooting flatten out like pancakes. I have only had about three in 20 come out of a deer. When I find them the ball is flat and big around as a quarter or more. I have some linotype and a bunch of Hornady lead balls. I wonder if I were to mix the Hornady balls and linotype about half and half, how do you think the new balls would perform? I think they would expand a little but be much harder and likely crush bone and still exit. Any of you got any experience with a similar mix??
Mark, There is not enough room on this forum to get into all the details of alloys in casting, but suffice to say....The short answer is because barrels aren't perfect.
The long answer is because cast bullet obturation (or bump-up) is a good thing.
Obturation is the plastic like deformation of the bullet alloy as a result of the pressure applied to the base, (or bottom) by the burning powder.....the resistance to movement of a body at rest.
By making the bullet soft enough that it can deform slightly upon firing, it does a better job of sealing the gases off behind it and minimizing blow-by and the leading that results from it.
Antimony and arsenic are the products of choice when it comes to hardening....but now we are talking about taking a hardness beyond a BHN of 20+
Trust me on this wheel weight thing. Metallurgist all agree that ww are "most likely" the best choice because of malleability, bump-up qualities, and availability.
We all have a tendency to "over engineer" about anything associated with shooting, especially casting, or running round ball.
Uncle Russ...