[dsv424]

Not sure what is causing this but I went to the range last night with my Glock 20 10mm to try some new reloads. Of the twenty that I shot 3 of them did not fire. This gun has been "Old Faithful" for me for 2 years, every time I pull the trigger it always went bang. Here are some pics of two that didn't fire and two that did. As you can see the primer was only lightly struck on the ones that didn't fire. Not sure if the reloads could cause this but I'm just not sure. Any suggestions would be appreciated.
http://i448.photobucket.com/albums/qq205/dsv424/P1020939.jpg
http://i448.photobucket.com/albums/qq205/dsv424/P1020941.jpg
http://i448.photobucket.com/albums/qq205/dsv424/P1020946.jpg

[rcmodel]

Couple of things to check that will cause the problem you have.

1. Most common is primers not seated fully which will cause light strikes because the firing pin energy is used up seating the primer. Unless the primer is all the way to the bottom of the primer pocket the anvil is not in firm contact with the case and cannot ignite the primer compound. The anvil must be pushed into the priming compound during seating to "pre-Load" it and make ignition possible.

2. Bullets are seated too long and contacting the rifling. This can hold the gun out of battery slightly.

Take the barrel out and chamber-check your loads to see if they will fully enter the chamber.
If not, mark the bullet with a magic-marker and press it fully into the chamber until the case rim is level with the back of the barrel hood. Tap it back out and see where the magic-marker is rubbed off by the rifling.
Continue to seat deeper until there is no problem just dropping them in the chamber and they fully seat.

rc

[greyling22]

will the duds fire if you try to fire them the second time? if so, it might be issue #1 from RC.

[Blind Bat]

I don't own a glock but I've heard others complain that they are really fussy about getting crud in the firing pin channel.

[Sunray]

Hard to tell exactly from your pictures, but it looks like the primer is too deep on the top right one and not deep enough on the bottom right. Different brass makes?

[Superblackrifle]

primer depth maybe?? After you seat the primers put them on a flat surface they should not wobble

[Hk Dan]

<ehem> Change out your striker spring. I'll give you 90/10 odds that the problem will be solved.

If you've done any trigger work on it, like putting in a connector with an overtravel stop, or the LW overtravel stop, then it needs a hair more overtravel.

In all likelihood, it's not gunk in your striker channel. If you just can't stand it, then pick up some wooden shafted Q Tips and run them up in there. Remember to limit the use of oil or solvents on the breechface and around the drop safety, as those are two areas where it can get in the channel. Again, it's not overly sensitive to gunk in there, but excessive amounts of anything can cause problems. Be sure not to leave any Q Tip in the channel.

[augustino]

I'm no expert but have shot glocks for years. Never used reloads. Only used ammo off the shelf. Never had a round NOT fire. And considering I don't clean my guns after each and every shooting excursion, I hesitate to think it's crud in the stroker chanel. I know this is to the extreme but I've seen videos of glocks burried in mud, then fired after shaking the debris off the pistol. Each time the trigger was pulled the gun went bang!
PROBABLY not the glock.

[Roccobro]

RC knows his stuff. Check your primer depths. If using a hand primer, give it a good squeeze on your next set of reloads.

And Starline brass is good brass. Doubt it is the cause.

Justin

[Bix]

How many rounds since you last detail stripped the gun?

[AKElroy]

I don't own a glock but I've heard others complain that they are really fussy about getting crud in the firing pin channel.

+1. I pocket carried a G27 for 8+ years before gettting my first FTF; light strikes just like you described. Popped out the FP, blasted the channel w/ break cleaner & got gobbs of lint & junk out of it. Strip the slide; you may find your problem.

[myg30]

If its not debree in the fire pin channel, is it possible you had some rifle primers mixed with pistol primers ? Just checking.