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DubiousDan wrote:

Richardc wrote:The polymer tip in thous rounds are to keep a bullet from premature expansion, like when striking a heavy winter coat. After the round penetrates to the body the much harder surface will force the polymer into the cavity then allow the hallow to expand correctly. This is all in theory of coarse, and to my knowledge the new ones are far better.

I got curious and looked around a bit and the only polymer tipped handgun caliber ammo form Hornady (currently offered) that I could find is the "FTX®LEVERevolution®" that is designed to be fired from a lever action rifle. I know in some cases such as with the Powerball, the polymer tip is designed to improve feeding in pistols that have problems with hollow points. With polymer tip rifle rounds they are designed to control expansion and to prevent damage to the tip of the bullet (vs. soft points) when feeding from the magazine into the chamber (this from Nosler).