9mm 124 +P v 147 v 300BLK 190gr

[Sugar]

300BLK specific magazines are HIGHLY recommended.

We're not satisfied with the magazine feed performance of PMAG 556 or Lancer L5AWM mags with supers and especially not with subs.

USGI actually work very well with supers and acceptably with subs.

The PMAG 300B is excellent with all ammo we've tested.
https://magpul.com/firearm-accessori...obal_color=118





This is true, but only for the top performing 9mm loads such as HST and Gold Dot.

For example, a 147 FMJ and a 124 FMJ both suck, while the HST versions are both great.

Bullet construction is critical for terminal performance of pistol and subsonic 300BLK projectiles.

Like I was saying to Todd.K, this is a super bummer because I am heavily invested in windowed M3 PMAGs but I guess I need to look into some 300blk PMAGs if I'm serious about keeping 300blk as a duty/carry setup.

and FMJ doesn't go into my duty/carry mags. No question there.