Zinc wheel weights are just that, zinc with no lead. Even the smallest amount of zinc accidentally introduced into your pot will ruin your batch.
I use a LEE hardness tester. The scale it came with starts at 8 BHN. So long as I stay in the 8-12 range I've had no issues. Can't say about Minie's though, have the molds but not made any yet.
As far as the comment about multiple shots because the projectile didn't expand on game. I've also hunted with big bore air rifles for years. I know for a fact that a single nonexpanding projectile that also does not generate the hydraulic shock a black powder gun does to the boiler room will cleanly harvest game. If it took multiple shots, there was something else going on.
I use a LEE hardness tester. The scale it came with starts at 8 BHN. So long as I stay in the 8-12 range I've had no issues. Can't say about Minie's though, have the molds but not made any yet.
As far as the comment about multiple shots because the projectile didn't expand on game. I've also hunted with big bore air rifles for years. I know for a fact that a single nonexpanding projectile that also does not generate the hydraulic shock a black powder gun does to the boiler room will cleanly harvest game. If it took multiple shots, there was something else going on.