I put in a supply of these several years ago, and can make my own with several cast bullets. I kind of like the extra penetration of a semi soft lead HP in 158gr weight. I'm shooting them in a 2" Detective Special. If I remember correctly the loads clock in a just short of 800fps in the Colt. In many guns the lead bullets seem too travel just a bit faster then the jacket counterparts of the same weight, with a touch less pressure.