The Firing Line Forums

Go Back   The Firing Line Forums > The Skunkworks > Handloading, Reloading, and Bullet Casting

Reply
 
Thread Tools Search this Thread
Old April 3, 2019, 04:09 PM   #1
black_hog_down
Senior Member
 
Join Date: May 13, 2016
Posts: 111
300 blk cycling problem

So my 300 blk loads don’t want to cycle properly. Factory loads run fine but my hand loads cycle the action but for some reason I have to fiddle with the safety before it will fire. Sort of rock the switch a little towards safe and back again before it will fire.
This is my second batch.
The first batch I made were sticking in the chamber because I hade bulged out the neck a little during bullet seating with a crimp.
I had to unload all those and threw out the brass cause they still stuck after resizing.
I’m guessing his problem is related. Maybe my case neck is still a tiny bit sticking (because I am messing up the shoulder during crimp) and it is slowing down the extraction a tiny bit and it is not cycling properly.
I am shooting 150 grain FMJ over 16 grains of 110.
Anybody seen this before?
Do you crimp your 300 blk?
Do you resize every time?
Thanks


Sent from my iPhone using Tapatalk
black_hog_down is offline  
Old April 4, 2019, 12:21 AM   #2
markr6754
Senior Member
 
Join Date: February 19, 2018
Location: Centerville, OH
Posts: 186
I’ve just started loading .300 AAC Blackout this year. My 150 gr and my 220gr loads using A1680 cycled my 8.5” pistol with pistol gas...using the same loads in my 10.5” pistol with carbine gas did not cycle the action. I’m using an Odin Works adjustable gas block, so I opened it up a lot more, but haven’t had a chance to retest.

I now crimp my rounds using the Lee Factory Crimp die for .300 AAC Blackout. I found that my subs wouldn’t pass my Hornady case gauge unless I crimped them. I prefer to crimp as a separate step, rather than letting my seating die do it.
markr6754 is offline  
Old April 4, 2019, 06:33 AM   #3
Mobuck
Junior member
 
Join Date: February 2, 2010
Posts: 6,847
I don't think this problem has anything to do with your reloaded ammo as long as the bolt is cycling fully. When you shoot the reloads, does the bolt lock open on an empty mag EVERY TIME? If so, your loads are cycling the bolt properly.
From your description, I'm guessing you have a problem with your disconnector. If so, figure it out immediately or else risk much more exciting malfunctions.
Mobuck is offline  
Old April 4, 2019, 06:52 AM   #4
dallasb
Senior Member
 
Join Date: October 30, 2011
Posts: 110
I had the exact same problem as you are having. Have you checked your sized brass before loading? In my case I had a faulty die that wasn't forming the shoulder correctly.

Sent from my SM-G950U using Tapatalk
dallasb is offline  
Old April 4, 2019, 10:56 AM   #5
FrankenMauser
Senior Member
 
Join Date: August 25, 2008
Location: Potatoes and Hops
Posts: 12,115
That sounds like a fire control issue, not an ammunition issue.
It may have been caused by unburned powder making its way into the fire control group, but I don't see it being an ammunition issue (other than avoiding loads that aren't burning cleanly).

Take that thing apart and take a good look at the fire control group. Something is wrong.
__________________
Don't even try it. It's even worse than the internet would lead you to believe.
FrankenMauser is offline  
Old April 4, 2019, 02:35 PM   #6
black_hog_down
Senior Member
 
Join Date: May 13, 2016
Posts: 111
Quote:
Originally Posted by FrankenMauser View Post
That sounds like a fire control issue, not an ammunition issue.
It may have been caused by unburned powder making its way into the fire control group, but I don't see it being an ammunition issue (other than avoiding loads that aren't burning cleanly).

Take that thing apart and take a good look at the fire control group. Something is wrong.


I would feel the same way except it doesn’t do it with store bought ammo.


Sent from my iPhone using Tapatalk
black_hog_down is offline  
Old April 4, 2019, 05:10 PM   #7
FrankenMauser
Senior Member
 
Join Date: August 25, 2008
Location: Potatoes and Hops
Posts: 12,115
There's something mechanically wrong with the system, if you have to wiggle parts of the fire control group to make it fire - whether using reloads, or factory ammo.

Things like headspace, neck diameter, and bullet seating depth don't operate a firearm's safety.
__________________
Don't even try it. It's even worse than the internet would lead you to believe.
FrankenMauser is offline  
Old April 5, 2019, 11:59 AM   #8
black_hog_down
Senior Member
 
Join Date: May 13, 2016
Posts: 111
I found this problem on another forum and found my problem.
I was setting up the resizing die to touch the ram but the handle was not “camming over”.
I tried a case that was sticking. By this I mean it would go into battery but would be very hard to eject when I pulled on the charging handle.
I adjusted the die so the handle would can over and now that same case will drop in and eject like butter.
Basically I was not pushing the shoulder down enough.
No clue how that relates to the safety. Can’t picture it in my mind.


Sent from my iPhone using Tapatalk
black_hog_down is offline  
Old April 7, 2019, 07:55 AM   #9
Road_Clam
Senior Member
 
Join Date: November 21, 2013
Location: New Hampshire
Posts: 1,450
I had all types of feeding and extraction issues when I was using LEE dies. After a lot of frustrating scratching my head as to what the problem was I bought a Hornady case gauge and realized the LEE dies were not fully sizing the base of the case. I ended up buying the RCBS "AR" small base dies and that was the end of my issues. Now I have excellent feeding and extraction. I also run only Magpul 300 B/O specific mags for reliable feeding. I mainly handload heavy 220 gr subsonic ammo for my 300 B/O

http://rcbs.com/Products/Dies-by-Cat...AR-Series.aspx
__________________
"To be old an wise you must have been young and stupid"
Road_Clam is offline  
Old April 7, 2019, 11:14 AM   #10
Sharkbite
Senior Member
 
Join Date: November 4, 2013
Location: Western slope of Colorado
Posts: 3,303
Its common knowledge in the 300blk community that Lee dies do a horrible job of forming 223 brass into 300blk brass.

For all things 300blk check out the forum 300blktalk. A WEALTH of knowledge
Sharkbite is offline  
Old April 7, 2019, 11:38 AM   #11
Mobuck
Junior member
 
Join Date: February 2, 2010
Posts: 6,847
AGAIN, I will comment that chambering, case sizing, or other ammunition related issues have nothing to do with your " I have to fiddle with the safety before it will fire."
For the safety of yourself and others, address this problem NOW.
Mobuck is offline  
Old April 7, 2019, 11:44 AM   #12
Metal god
Senior Member
 
Join Date: April 10, 2012
Location: San Diego CA
Posts: 4,820
Quote:
I was setting up the resizing die to touch the ram but the handle was not “camming over”.
Quote:
I adjusted the die so the handle would can over and now that same case will drop in and eject like butter.
Basically I was not pushing the shoulder down enough.
Can you explain in a little more detail please ? Did you adjust the die down or up to get camover ?

Regardless I'm with FrankenMauser & Mobuck on the over all issue . If you need to wiggle the safety to get the trigger to work . The issue is the trigger group or safety . As Frank pointed out and I think he's on to something , The wiggle of the safety is likely dislodging something that is binding up the system , be that unburned powder or something else .

Even if you think you're 100% correct that it was a sizing the case problem . I strongly recommend you pull the FCG out and clean it up as well as the internals of the lower it self .
__________________
If Jesus had a gun , he'd probably still be alive !

I almost always write my posts regardless of content in a jovial manor and intent . If that's not how you took it , please try again .
Metal god is offline  
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 03:36 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
This site and contents, including all posts, Copyright © 1998-2018 S.W.A.T. Magazine
Copyright Complaints: Please direct DMCA Takedown Notices to the registered agent: thefiringline.com
Contact Us
Page generated in 0.06040 seconds with 10 queries