I use Remington subsonic almost exclusively. I've never had any reliability issues with this round. Additionally after tons of ammo trial and error with tons of different brands, velocities, etc., these have proven most accurate at 50yds from my rifle.
Additionally, the sound level with earplugs in is very low and feels / sounds 'supressed' as I'm shooting it, which is actually pretty cool. The higher velocity stuff moving up to Stingers starts to get noticeably louder and crack pretty good under the roof at my range.