Any Subsonic loads for a 200gr SMK?

[RobRat]

I've looked at the Sierra data, and their slowest listing is for 1100FPS with the 200 gr SMK, and a statment "Loads less than minimum charges shown are not recommended".

Got a couple boxes of the 200 gr SMK's left over from a 300RUM project, thought I could us them with the 300/221. Kind of ironic, trying to find a subsonic use for bullets I was trying to drive as quickly as humanly possible. With the RUM, I discovered that I really didn't enjoy recoil all that much.

[egraham]

Try 6.8-7.0 grains of aa#5. I use this with 208 gr amax out of a BOLT GUN and it is super quiet and accurate.

[Colohunter]

I have had good luck with AA 1680 with both 220gr bullets and 150gr bullets. As an added plus it cycles the action on my AR.

[Expatriot]

Ive been playing with H4227 and H322 for 200gr subsonics and both work really well as they cycle an AR reliably.

[hugginsvilleH&A]

I to use mostly 1680, and also the 4227 both cycle fine

[Expatriot]

I have settled on W296 as the best powder with H4227 as a backup. These powders seem to be the most reliable with a wide operating range.