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10/3/2025 9:53:17 PM EDT
I just got a 300bo barrel for my Steyr and plan to shoot the 220 grain subsonic Atomic brand ammo through it.  Will this damage my rifle?   Anybody tried shooting 300 suppressed?
Any tips about the gas plug setting?  Thanks
10/4/2025 11:27:07 AM EDT
[#1]
I shoot mine suppressed. Why would you think it could be damaged by suppressing?

The pamphlet that arrives with the barrel thoroughly explains gas regulator settings - everyone’s gun could be different based on your gun, can, and ammo. Read the pamphlet and adjust accordingly.

Congrats on the new barrel!
10/4/2025 9:11:18 PM EDT
[#2]
Quote History
Originally Posted By 80085:
I shoot mine suppressed. Why would you think it could be damaged by suppressing?

The pamphlet that arrives with the barrel thoroughly explains gas regulator settings - everyone’s gun could be different based on your gun, can, and ammo. Read the pamphlet and adjust accordingly.

Congrats on the new barrel!
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Thanks. I read that manual and the part about the gun possibly blowing up if the wrong gas setting is used with supersonic ammo is a little concerning.  But I don’t have any, just subsonic
10/4/2025 10:26:14 PM EDT
[#3]
Quote History
Originally Posted By kingfish:


Thanks. I read that manual and the part about the gun possibly blowing up if the wrong gas setting is used with supersonic ammo is a little concerning.  But I don’t have any, just subsonic
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Tag for info because I don't see how that would be possible.  The gas plugs have an "off" setting which presumably would render the highest chamber pressure.  Running wide open on the adverse setting through a clean gun would probably just cycle the bolt harder than need be and maybe prematurely wear it but I can't imagine it blowing up.  

Genuinely interested to hear about this since I plan on ordering a 300BLK barrel for one of my AUGs to run suppressed somewhat soon.
10/5/2025 9:39:05 PM EDT
[Last Edit: yamahawarrior89][Edited] [#4]
I would think a cracked stock would be more likely if you used standard velocity ammo in the LV setting.

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10/6/2025 1:51:54 PM EDT
[#5]
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The stock breaking would be considered a catastrophic failure of the gun- it isn't going to work anymore with a broken stock.

Most likely that is for legal protection and emphasis of it being "really bad" to do that in case someone puts it on LV, or is tempted to put it on LV,  while shooting supersonic 300 BO.


Sven
Manticore Arms
Advanced Fighting Gear for the AR, AK, AUG, Tavor, and Scorpion EVO! www.manticorearms.com
10/8/2025 10:26:21 AM EDT
[#6]
I wouldn't worry about the off position. Steyr has always had an option for an off position for launching NATO-standard rifle grenades. Even though Austria isn't technically a NATO country. They are like an adopted child of NATO.

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