Query to the .300 Whisper/BO shooters out there:

by Gunner , St Louis, Monday, August 05, 2024, 09:32 (111 days ago) @ A K Church

Military likes 6.5" barrels in the 300 Blackout as they want compact guns for CQB type work. Most experts/industry people says 8.5-10.5" barrel is the best range. I have a 10.3" and 10.5", with a can they don't feel long, though don't feel short either. I see everything from 5.5" to 16" barrels but feel like you get the most out of a 9-10", that is high velocity and sub sonic shooting. If you are only shooting sub sonic loads and want compact OAL do a 6"-8" barrel. Those big 220gr slugs shoot fine out of the short barrels. Remember shorter barrel equal less velocity means quieter gun.

Chornograph data shows 220gr sub loads run around 950 fps from a 10.5" while the 150gr run 1750 fps.

Gunner

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