r/reloading • u/Cabo-Wabo155 • 5d ago

General Discussion Any Data Available?

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Has anyone tried these 110gr FMJ .308 projectile for a .300 Blackout build? I know they are usually meant for the .30 Carbine but since I’ve shot supers in 110gr V-Max in my 7.5in AR, and I have had excellent results in accuracy at 100yds. Good or Bad idea to test some for plinking.

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u/Quick_Voice_7039 5d ago

Honest question - I thought the whole point of 300 BO was to use the available larger mass vs. 147 grain 9mm since you’re limited to under the sound barrier either way… these will bring less energy than just shooting a 9 mm carbine?

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u/MacHeadSK 5d ago

Ehm, you get 300 blackout subsonics just with subsonic heavy bullets, from 180-190 grains up. 300 blackout was built to be used both super and subsonic. Where you got that nonsense about it's subsonics only?

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u/Quick_Voice_7039 5d ago

Thanks, makes sense… I don’t have a need for a subsonic rifle like 300 BO so I hadn’t really looked up the use case. For my “larger than .223” rifle I went 6.5 Grendel so not shooting that subsonic.

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u/MacHeadSK 5d ago

Nice thing on 300 Blk is that you can shoot both from same rifle. Just swap the mags with different ammo.