### More Data Sources on Bullet Strength

Posted:

**Sun Aug 09, 2015 9:25 am**It's hard to find laboratory data on bullet strength and all too often casters rely on rules of thumb that are not good rules (I'm talking about you, 1422X forumula ! ).

What little data exists is usually for solders because apparently solder companies care about strength enough to actually test it. Here is some data found at this link:

And here is more solder data, if you don't mind converting the metric units to psi.

Let's take 10:1 alloy, with a tensile strength of 4400 psi and a BHN of 11.5. Linotype is about twice as hard so it's reasonable to assume that linotype would also be twice as strong -- 8800 psi. Heat treated wheelweight would be 3 times as hard so it's reasonable to assume that it would be 3 times as strong -- 13,200 psi. That's just a quick and dirty way to look at it, but it's a reasonable ballpark estimate. Lead is not made out of steel, folks.

What little data exists is usually for solders because apparently solder companies care about strength enough to actually test it. Here is some data found at this link:

And here is more solder data, if you don't mind converting the metric units to psi.

Let's take 10:1 alloy, with a tensile strength of 4400 psi and a BHN of 11.5. Linotype is about twice as hard so it's reasonable to assume that linotype would also be twice as strong -- 8800 psi. Heat treated wheelweight would be 3 times as hard so it's reasonable to assume that it would be 3 times as strong -- 13,200 psi. That's just a quick and dirty way to look at it, but it's a reasonable ballpark estimate. Lead is not made out of steel, folks.