For plinking in my G27, I use the $7.57 Blazer Brass from Walmart. I have never had a problem using this stuff. I have about 2-3k stocked up, and have run probably 1500 through it. I have never had any problems with WWB either, but I run this less due to cost. I had a few failure to fires with Rem PMC, so I changed out the firing pin spring. I think it was a bad batch of ammo, but a new spring was cheap insurance.
For carry use, I use Winchester Ranger. IMO, just pick a quality brand of HP ammo, and run a few hundred through it so you know it works. I think its just a matter of opinion as to what is best.
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