Suppressed Subsonic 300 Blackout

Be careful with the Sub-x 190's, I could not get them to feed reliably without bullet setback using several barrels. I don't know if it's a feed ramp issue or what but it's not a problem with the Sig. If you look at the barrel extension on the Sig, it's a lot longer than a typical AR15/300 blackout extension. My upper receivers were M4-type, VSeven.

I have no issues running any subsonic projectile on my 8" (other than the Hornady 190 Sub-X) but I hand load and use two specific powders which will cycle anything. I also use lightweight titanium BCG's and captured lightweight buffer systems which helps.

I run standard bcg, buffer and spring no fan boy shit. Not even an agb on this upper.

It works with all the subs I have tried. Pick a bullet do some very limited load development and shoot.

It also runs supers just fine can or not it's a dirty pig with supers and the can.

Ape_Factory said:

Be careful with the Sub-x 190's, I could not get them to feed reliably without bullet setback using several barrels. I don't know if it's a feed ramp issue or what but it's not a problem with the Sig. If you look at the barrel extension on the Sig, it's a lot longer than a typical AR15/300 blackout extension. My upper receivers were M4-type, VSeven.

I have no issues running any subsonic projectile on my 8" (other than the Hornady 190 Sub-X) but I hand load and use two specific powders which will cycle anything. I also use lightweight titanium BCG's and captured lightweight buffer systems which helps.

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I'll keep an eye on the Sub-x 190s, thank you. I will say I had a lot of feeling issues with them across a few uppers until I started using Magpul's 300 blk specific magazines. Since then, none. ( I don't shoot the 190s a lot, but...)

I really enjoy my LMT CHODEWAR with the 9” barrel. With either my GA EXLORR 300 or the AB A-10 Warthog 7, Hornady Sub-X’s are laughably quiet.

Deepwoods said:

I'll keep an eye on the Sub-x 190s, thank you. I will say I had a lot of feeling issues with them across a few uppers until I started using Magpul's 300 blk specific magazines. Since then, none. ( I don't shoot the 190s a lot, but...)

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I ran Magpul and Lantac 300 blackout-specific mags only. Still no luck with either. I think it's the feed ramp angle but I finally gave up, threw money at the problem and bought the Sig after examining the extension and feed ramps on the LT. I went so far as to duplicate the factory loads, same COAL, everything but no luck on any AR15 M4 feed ramps. I tried two different barrels, two different uppers. I've been divesting myself of all thing Sig but I have to say the LT is actually bad-ass despite my hatred for the 1:5 twist. It just eats everything. I have an FRT in it currently and it'll just go through mag after mag of the Sub-X rounds without a single hiccup. I can't remember a single FTF with it, ever.

Mine has an 8" barrel and with the Stealth 220gr through my Nomad it is not much louder than a painball gun.