I have fired through multiple boxes of Magtech 10mm with no issues, seemed to not be pud-loaded. However, I bought a case of their 10mm this year and had issues with some of it. Seemed like the case mouth was a hair too wide and had failures to feed. The last couple boxes seems to work okay.
I spoke to MAC's camera guy at the NRA show and he said they had issues with Magtech then they bought it in bulk.
Just my two cents. 9mm might be okay.