.223 Subsonic load question

[One Shot]

Anyone doing this ? What / how much powder to start with ? I'm using 9gr H100 with my 220 grain Whisper loads. Cound I start with the same ones ? I'll be shooting 55gr ammo.
Thanks
One Shot

[JFettig]

I really don't know of anyone doing this. I had to load some at a greatly reduced velocity(not quite subsonic) for something and it took a dangerously reduced charge of a super slow powder. The case was only about 60% full, I made sure the powder was to the back when I fired it.


Jon

[jarhead1086]

Subsonic .223 is also called .22 LR. Save yourself the hassel/expense and buy Aguila 60 grain SSS for your .22. Its better, cheaper, and safer.

[One Shot]

Thanks
Just a thought to use a can on my .223

[Pitt300]

Jarhead is 90% correct.
If you have an AR it's not really worth it as NO subsonic loads will cycle the action & you have to dismount rifle & manually cock it to cycle then remount & shoot. PIA
W/a bolt .223 or I have a KelTec SU16C that has a bolt handle on it w/a 20-30 round mag & it works well.
Heaviest bullets that I've gotten to stay stable are the 69g SMKs.
Tried 80g Bergers & at 25 yards @ 1050 fps they were going thru the target sideways. NO I did not have my can on it.
69g SMKs w/4.7g of TB gives me about 1040fps out of 20"AR.
Haven't clocked 16" KelTec but I know its subsonic.
This has more energy than most .22 subsonic Rimfire loads.
40g .22 Rimfire @ 1040 fps approx 78ft# @ 100 yards
55g .223 @ 1060 fps (3.2g Clays or 3.1g Tite Group) approx 114ft# @ 100 yards
60g Aguillas fall in here BUT you need a VERY fast twist barrel to stabilize
69g .223 @ 1060 fps approx 150ft# @ 100 yards

[One Shot]

Thanks. I'm going to scrap that idea.
I just got my can yesterday, and put a bunch through my .300 / .221
It was a hoot !