A lot of wisdom from a wise poster.HST is very good ammo but what gun, barrel length? A .45 will sometimes not expand due to the slower velocities. Shorter barrel .45's more so. I cary FMJ S&B in my Kimber 3" barrel and my XD MOD.2 3.3" .45 for that reason.
I never expect any bullet to expand. If it does, I'll take it. But I don't expect expansion. There are too many variables that can screw up a bullet's ability to expand.