AR Troubles

[Dishonored]

Has anyone ever seen the small goldish grit like that in their .300 blk’s? Wondering if it could also be some sort of particulates from the sub powder.
Cause this other rifle has a few pieces.

The feed ramps on this one are also correct.

 

[Bam Bam]

The brass scoring marks on the bottom of bolt carrier could mean it needs to be polished. I tend to polish all my guns bolt carriers, it helps keep the bolt speed up. A very knowledgeable guy told me that one day. been doing it ever since.

 

[La26]

What type of powder are you loading with? The photos 'almost' look like unburned powder, similar to what I experienced when using 4227

 

[Dishonored]

What type of powder are you loading with? The photos 'almost' look like unburned powder, similar to what I experienced when using 4227

This is all Winchester brand ammo being used.
Winchester Target & Range 147gr supers
Winchester Target & Range 200gr subs.

 

[Dishonored]

Update….

Pulled the barrel, corrected the feed ramps on the extension. Polished them a little (I didn’t go to the extreme with this). Start to finish took a little over an hour using the following:
* dremel brand rotary tool (stylo model)
* 5/32” dremel stone used for chainsaw sharpening.
* bullet shaped wool polishing pad for dremel
* dremel #421 polishing compound


Took it to shoot and it runs as it should now.

Before and after pics..

 

[AdvancedLaser]

Boom.

 

[AdvancedLaser]

Barrel/extension… causing it to sprinkle brass like sand in your upper… barrel should have some kinda marking on it… or it’s the aero upper… but that’s pretty rare with aero quality, not impossible though

"Aero quality"....lol

 

[frankinola]

On the Winchester subsonic loads there was a bunch of un-burned powder in my lower. I got some Ammo INC and AAC sub loads to see if they suffer the same issue.

 

[Dishonored]

On the Winchester subsonic loads there was a bunch of un-burned powder in my lower. I got some Ammo INC and AAC sub loads to see if they suffer the same issue.

I’ll know here shortly also. I just ordered 200 rounds of AMMO Inc. subs and another 200 of their supers.

 

[Bigchillin83]

I have ordered a good bit of .300aac from them, they seem to have pretty good priced and often have 10% off coupons

300 AAC Blackout Ammo | American Marksman

www.theamericanmarksman.com