WTK: Where to buy Corbon Subsonic

[bluker1]

All,

Thanks for the great resource here on the 300 Whisper! I'm building two AR Whisper Uppers and I'm looking to get some Corbon factory ammo in the 220 load before I start loading mine as a reference. I even called corbon and they told me they are out, because they are going thru the SAAMI process of getting it certified so it won't have .221 fireball on the cases anymore. Does anyone know of somewhere that has the Subsonic in stock?

ps. What is the best subsonic load for a 10inch 300 whisper AR upper with a Gemtech TPRS? I'm building one in 16 and one in 10inch.

thanks in advance,
alan