What causes a misfire with .22 LR ammo? - THR

Go Back   THR > Tools and Technologies > Rifle Country

Welcome to THR
You are currently viewing our site as a guest which gives you limited access to view most discussions, articles and access our other FREE features. By joining our free community you will have, access to post topics, communicate privately with other members (PM), respond to polls, and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please visit the help section.

Thread Tools
Old Yesterday, 10:38 AM   #1
Contributing Member
Join Date: February 3, 2012
Location: Alabama
Posts: 1,637
What causes a misfire with .22 LR ammo?

I had a misfire yesterday using a sub-sonic ammo out of a Winchester semi. I have shot several boxes of this exact ammo as I use it as my main varmint eradicator around the house. I lined up the shot and got a click rather than a bang. Since this is sub-sonic it normally does not feed well so I basically use the gun like a bolt gun and manually feed each round.

I don't know the internal workings of 22 ammo like I do center fire so I was just wondering how the ammo actually works. There was a clear ding in the bottom of the round and the next time I pulled the trigger the round(different round)went off as expected (bad news for the chipmunk). I did not try to fire the dud again but just tossed it.
"...if I was wrong don't you think I'd know it?"- Dr Sheldon Cooper
jrdolall is offline  
Old Yesterday, 10:48 AM   #2
Jim Watson
Join Date: December 24, 2002
Posts: 17,956
During manufacture the priming mix is moved to the rim by spinning the brass.
Sometimes there is a little gap. If that is where your firing pin hits, misfire.
Try it again with the round oriented differently in the chamber to be hit somewhere else on the rim. If it doesn't fire then, it either lacks priming compound entirely or maybe it did not get fully dried.
I have a few facts and a lot of opinions.
Jim Watson is offline  
Old Yesterday, 11:28 AM   #3
Join Date: February 5, 2010
Posts: 3,169

Further, the priming compound is impact sensitive. Silica is embedded to provide the friction necessary to provide detonation upon impact from the hammer. Jim is of course correct on both instances denoted providing a no-go dud as the prime is stable when wet and does nothing if the firing pin hits a void.

Most every "dud" I've had did indeed fire on being re-chambered.
Skylerbone is offline  
Old Yesterday, 12:11 PM   #4
Join Date: August 30, 2013
Location: Northern Virginia
Posts: 339
My Scoutmaster always told us to rotate the round and try a second time. Most of the time the second strike will fire the round.
Jim (post #2) is correct an air gap in the primer.
"Great spirits have always encountered violent opposition from mediocre minds."
Albert Einstein

10mm Club Member #56
tommy.duncan is offline  
Old Yesterday, 12:28 PM   #5
Join Date: March 26, 2008
Location: Rhode Island/Florida
Posts: 432
Quite common in bulk pack ammo. That stuff sold on 550 round loose pack boxes. Remington seems the worse but Federal and Winchester both will have a 1/2 dozen or so to a box. Even that seems a little given the production rate.
Mousa: God must love crazy people.
Rambo: Why?
Mousa: He made so many of them.
Rambo III
whughett is offline  
Old Yesterday, 01:14 PM   #6
Contributing Member
Join Date: February 3, 2012
Location: Alabama
Posts: 1,637
Thanks for the info. This was Gemtech subsonic and has been completely reliable for me over the past year or so with maybe 125 rounds fired in sighting in and eradicating pests.
I now have an understanding of how the rimfire ammo ignites which is what I was looking for.
"...if I was wrong don't you think I'd know it?"- Dr Sheldon Cooper
jrdolall is offline  

Thread Tools

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 -4. The time now is 12:25 PM.

Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
vBulletin Optimisation by vB Optimise.
This site, its contents, Shooting Reviews, and its contents are Copyright (c) 2010-2013 Firearms Forum, Inc.
Although The High Road has attempted to provide accurate information on the forum, The High Road assumes no responsibility for the accuracy of the information. All information is provided "as is" with all faults without warranty of any kind, either express or implied. Neither The High Road nor any of its directors, members, managers, employees, agents, vendors, or suppliers will be liable for any direct, indirect, general, bodily injury, compensatory, special, punitive, consequential, or incidental damages including, without limitation, lost profits or revenues, costs of replacement goods, loss or damage to data arising out of the use or inability to use this forum or any services associated with this forum, or damages from the use of or reliance on the information present on this forum, even if you have been advised of the possibility of such damages.