Pennsylvania Firearm Owners Association
Page 1 of 2 12 LastLast
Results 1 to 10 of 11
  1. #1
    Join Date
    Jan 2010
    Location
    altoona, Pennsylvania
    (Blair County)
    Posts
    1,774
    Rep Power
    1511248

    Default 300 BLK cycling issue maybe

    So I put together a new 300 BLK pistol from PSA. It's an 8.5 inch. I had it out to the range to check the function and sight in scope before I paint it. Anyways shot 4 different supersonic loads got it sighted in easily. shot a couple hundred of those. Before I left I loaded up 5 Hornady Black 208gr subsonic. It will fire 1 round and return to battery without stripping another bullet out. Then obviously a click. Pull and release charging handle, or lock it to the rear and use bolt release and it loads a round then the same again. I've read that barrels less then 9 inches may not cycle without a suppressor with subsonic ammo. Which would be fine as that the plan anyways. In just trying to figure out if its under gassed because of the short barrel does it have enough power to eject a shell but not move far enough back to strip a new bullet out? Otherwise I cant see how it could eject and also go back into battery without taking a bullet with it?

  2. #2
    Join Date
    Jan 2016
    Location
    Pittsburgh, Pennsylvania
    (Allegheny County)
    Posts
    800
    Rep Power
    21474841

    Default Re: 300 BLK cycling issue maybe

    when i was developing loads for my psa pistol some of the sub rounds would do the same thing. fire, eject, not strip another round.

    The gas port can reemed open up a bit to increase the gas but you should have a adjustable gas block so it isn't over gassed with supers.

    or just find a sub that your pistol likes.

    check out 300blktalk.com

    any issue with a 300 bo have been talked about endlessly on that web site.

    The can will have a big effect on your pistol cycling.

  3. #3
    Join Date
    Aug 2011
    Location
    Milford, Pennsylvania
    (Pike County)
    Posts
    3,581
    Rep Power
    17972619

    Default Re: 300 BLK cycling issue maybe

    This is a known issue with short barrel subs and no suppressor

  4. #4
    Join Date
    Apr 2013
    Location
    Glockin, Pennsylvania
    (Montgomery County)
    Posts
    3,121
    Rep Power
    21474847

    Default Re: 300 BLK cycling issue maybe

    I doubt you'd want to open up the gas port enough to reliably run unsuppressed subs because then supers will be over-gassed. Like others said either run it suppressed or get an adjustable gas block.

    But overall doesn't seem like any issues besides being undergassed for the given load.

  5. #5
    Join Date
    Jan 2010
    Location
    altoona, Pennsylvania
    (Blair County)
    Posts
    1,774
    Rep Power
    1511248

    Default Re: 300 BLK cycling issue maybe

    I wont do anything as long as most people think this will go away when I put on the suppressor. I just will shoot supersonic till then.

  6. #6
    Join Date
    Jan 2019
    Location
    Bedford
    Posts
    34
    Rep Power
    0

    Default Re: 300 BLK cycling issue maybe

    You can also look into lightening the BCG and/or buffer & spring adjustments. It really depends on how much short of stripping the next round it is.
    (Hint, most newer phones have really good slo-mo cameras that you can watch the BCG travel having a friend slo-mo video your shots)

    Try some 220gr Remington subsonic rounds, I've had good luck with them.

    Finally, if it's brand new, a few good cleanings and break-in will help cycling.

  7. #7
    Join Date
    Apr 2020
    Location
    Nunya, Pennsylvania
    (Montgomery County)
    Posts
    31
    Rep Power
    0

    Default Re: 300 BLK cycling issue maybe

    No interest in an adjustable gas block?

  8. #8
    Join Date
    Jan 2010
    Location
    altoona, Pennsylvania
    (Blair County)
    Posts
    1,774
    Rep Power
    1511248

    Default Re: 300 BLK cycling issue maybe

    nah, not going to mess with it for now. If I have problems with it after suppressed Then I'll figure it out.

  9. #9
    Join Date
    Jan 2010
    Location
    altoona, Pennsylvania
    (Blair County)
    Posts
    1,774
    Rep Power
    1511248

    Default Re: 300 BLK cycling issue maybe

    Had it out to the range again today. Got some really good groups. Cant figure out how to post a pic but with the Sig Elite 147gr I had 8 round group about 1.5 inches. The precision brand reman ammo about 4" 10 round group. I'm sure the gun is capable of more but it would look pretty sill with a scope longer then the barrel.

  10. #10
    Join Date
    Oct 2006
    Location
    lebanon, Pennsylvania
    (Lebanon County)
    Age
    46
    Posts
    3,847
    Rep Power
    13214097

    Default Re: 300 BLK cycling issue maybe

    i used psa parts and an upper to assemble my 8.5" 300blk rifle, no issues with subs, can or no can though i use 220 bullets for my subsonic loads @900ft/sec.
    i did load up some 150 grain supersonics, which i didn't like, just felt like the gun was taking a beating.
    it's only metal, we can out think it....

Page 1 of 2 12 LastLast

Similar Threads

  1. AR Build Cycling Issue
    By ViperHummel in forum Rifles
    Replies: 14
    Last Post: June 27th, 2012, 01:21 PM
  2. Yugo SKS not cycling
    By mak47 in forum Gunsmithing
    Replies: 10
    Last Post: September 13th, 2010, 11:33 AM
  3. Springfield XDm cycling issues
    By forealfreal2001 in forum Gunsmithing
    Replies: 52
    Last Post: May 4th, 2010, 04:21 PM
  4. 10/22 cycling issues
    By scoutjoe in forum General
    Replies: 6
    Last Post: April 2nd, 2009, 12:24 AM
  5. Replies: 10
    Last Post: May 23rd, 2007, 02:42 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •