Sellier & Bellot
.300 Blackout FMJ
Subsonic.300 Blackout
The manufacturer states this load is subsonic. No muzzle velocity is published for it.
Sound travels at about 1,050 fps on a freezing morning and about 1,150 fps on a hot afternoon.
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as of Oct 14
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- brass
- Case
- 1000 rounds
- Box
- $1.04
- Per round
About .300 Blackout
Heavy subsonic bullets (190gr and up) need a fast twist to stabilise. A 1:8 or faster barrel is the usual recommendation; a slow-twist barrel can keyhole them.
Subsonic .300 Blackout often will not cycle a semi-automatic without a suppressor or an adjustable gas block.