Subsonic Ammo

[NoVAlooker]

My brother came over today with his Glock 17 and a couple of boxes of Federal 9mm subsonic ammo (HP)

We are going to the range tomorrow to test it out. Never heard of it before, and he wasn't able to really explain its use (beyond using it in conjunction with a silencer to cut out sound)

Can anyone offer insight?

I'll post my reactions tomorrow.

Later

[Snowdog]

I do believe all 147gr 9mm ammunition is subsonic (perhaps with Cor-bon being the exception).
Some manufacturers may point out the fact that their 147gr JHP or FMJ ammunition is subsonic.

Just run of the mill stuff, nothing special.

[C.R.Sam]

Anything slower than bout 1100 ft sec at sea level is subsonec. Lot of handgun ammo falls in that catagory.

Sam