Gee, somebody brought a T/C Contender to a pistol party

Damned things make all other pistols feel inadequate. If mine (.35 Remington, .223) don't shoot under 1" @ 100yds it's on me. OTOH a stock S&W revolver like my 586 will quite often shoot under 2" @ 50 yds with my match ammo.
Glocks are amazing but the carry guns aren't target guns. Sounds like you have a good load, jbrown, now it's all up to you. Can't blame the gun or ammo for poor groups now.