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300 blackout
 Moderated by: Poacher, DesertMarine
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 Posted: Wed Mar 1st, 2017 05:07 PM
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Senior Member

Joined: Thu Nov 5th, 2009
Location: Somewhere, Oklahoma USA
Posts: 1216
Photo: [Download]
Are you a handloader?: Yes
Favorite type of cartridge to load?: I load everything!
My favorite chambering is:: 243ai ...

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build a 300 blackout .have a black barrel 20 in lenght of barrel for shooting 150 grain nonsuppress.also on drilling barrel for gas block,best size hole>? would a pistol type gas tube work or carbine length?thanks

 Posted: Wed Mar 1st, 2017 05:23 PM
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Master Handloader

Joined: Sat Jan 17th, 2009
Location: Columbia Falls, MT
Posts: 5736
Are you a handloader?: Yes
Favorite type of cartridge to load?: rifle
My favorite chambering is:: 270wsm ...

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With the case capacity of 300BLK, I don't see how 20" barrel is more efficient than 16". As far as port location, for shooting supers carbine works well, for subs pistol location, allows more flexibility. Port size depends largely on port location and intended use.

Why the 150s? Unless using cast, 110-130gr gives best balance of energy and trajectory, for hunting, with supers.

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