I've shared in another thread about my SCT frame being lost. I want to update everyone on the build and an issue I'm having. I have Magpul 10rd mags and on the last round it'll lock the slide open. If I drop the slide stop it'll load the last round. I don't know what is hanging it up. I'll post pictures in a few. Any ideas would be great!

I had an issue where the slide would not go into battery but I oiled a bit more and worked the slide and that has been worked out. I believe that issue is just break in related. 

 

In my Glock 19 using Freedom Munitions hollow point target ammo I sometimes get this. https://www.freedommunitions.com/9mm-luger-124-gr-hp-reman.html

What ammo are you using and have you tried anything else?

Just dummy rounds as of now. I haven't taken it to the range yet. 

Dummy rounds could be too light.

10 round mag springs can be too strong as well, compared to a full sized full capacity mag.

I noticed this on my Jericho 941.  I switched out the slide stop to a dogleg slide stop, which was .1oz lighter than the stock one.  The slide was locking back with 2 or 3 rounds left in the mag vs none.  

12 hours ago, InFamous said:

Just dummy rounds as of now. I haven't taken it to the range yet. 

Wait…

You have not fired this pistol with live ammo yet?

2 hours ago, High Exposure said:

Wait…

You have not fired this pistol with live ammo yet?

I just finished building it a little over a week ago. I have not gone to the range yet, no.

Ok. Shoot it with live ammo and then report back with any issues.

You can’t diagnose last round hold open issues based on admin manipulations with Dummy rounds.