As Fred says above, unless the ammo has "street cred" it's probably better to not use it for CCW.
That said, I have had good results from Underwood ammo and many others have, too. But it hasn't "paid its dues" in LEO guns, etc. The final decision is up to you.
-- Robert --
NRA Life Member
"Giving Money and Power to Government is Like Giving Whiskey and Car Keys to Teenage Boys" - PJ O'Rourke