Jump to content

M4 Hornady CD Failure to Eject

Doc Holliday

Recommended Posts

I tried some Hornady Critical Defense  00 Buckshot in my M4 today.  I only shot 10 rounds of it, but to my surprise I had 3 or 4 failures to eject.  The extractor was slipping off the rim of the shell, leaving it about halfway out of the chamber.   I fired 50 or so rounds of Winchester and Federal with no other malfunctions and I’ve never had this happen with any other rounds. Only other malfunctions I’ve had has been low recoil rounds failing to cycle, which isn’t too surprising.  My extractor appears undamaged on visual inspection.  On close inspection of the Critical Defense shells, the rims appear and feel more rounded and less aggressively angled my other shells, even some old Hornady Superformance shells I have on hand (which have functioned reliably).  This leads me to believe that the “smoother” rim is allowing the extractor to slip off the shell as the bolt is driven back by the gas system.  Goes to show why it’s so important to function test any new ammo in your firearm before trust it potentially with your life, even if it’s considered premium ammunition.  Anyone else experience this with Hornady CD?

Edited by Doc Holliday
  • Upvote 1
Link to comment
Share on other sites

  • 4 weeks later...
  • 5 months later...

So, I'm a little late to this party, but i figured I'd post anyway.  Same thing happened to me with this same ammo when I first got my M4 back in 2019, I even posted about it here.  I never did really figure out the cause but wasn't really worried since it was only the one type of ammo that did this.  I mostly stick to Winchester and Federal these days which hasn't given me a problem.

100% agree with testing your HD ammo first.  I had Critical Defense loaded up for almost a month before I realized my M4 doesn't like it very much. 

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Unfortunately, your content contains terms that we do not allow. Please edit your content to remove the highlighted words below.
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...