HK polygonal barrel & lead bullets
I am considering buying a HK USP 45 and have been researching this pistol and a couple others. Anyway I found it has a polygon barrel and I have heard you can't fire lead through those barrels as it leads easier and can become dangerous (according to Glock). I am assuming the true is the same for HK...is it? Does anyone use lead on a regular basis? I was considering using the pistol for competition and would like to use lead.
Is a Sig Saur as good a pistol as HK and what kind of barrel does it have ( land and grooves or polygon)?
If I can't use the HK for shooting lead bullets, is it possible to obtain a good barrel replacement just for shooting matches?
Does anyone shoot IDPA and if so what would be a good,accurate pistol be that would serve double duty as personal protection in the home? For carry I use a Taurus PT111.
Thank you all in advance...much appreciated!!