Are these all new magazines?
How easy is it to load the first two bullets going into the magazines?
Does it happen if you only load 6 rounds into the magazine? 7 rounds? 4 rounds?
Is there wear on the feed lips of the magazine where the slide may be contacting the tops of the feed lips?
Did they cerakote the bottom of the breach block area? The face that slides across the top of the magazine.
Can you pull the magazines out without using the mag release?

Quote from: Pinsnscrews on October 09 2015 12:41:42 PM MDT
Are these all new magazines?
How easy is it to load the first two bullets going into the magazines?
Does it happen if you only load 6 rounds into the magazine? 7 rounds? 4 rounds?
Is there wear on the feed lips of the magazine where the slide may be contacting the tops of the feed lips?
Did they cerakote the bottom of the breach block area? The face that slides across the top of the magazine.
Can you pull the magazines out without using the mag release?

Well I just replaced the RS with a 22# Wolff.  Also I put a new guiderod and plug.  Also I bought a few extra power mag springs to try out just in case my mags need more Oomph!  I hope to head out to the range tonight to do some testing.  I have a pack full of different RS.  We'll see, and I'll be sure to share a report.

To answer your questions, all the mags were purchased new shortly after I got the gun.  The first two rounds load somewhat easy. Not hard, but not soft either. 
I will have to check where the wear is occurring on mag, lips, etc. 
Sorry, I'm a newbie, and I'm not certain what the breach block is?? If it's what you're describing, and I'm thinking, then yes, it was Cerakoted, but I removed it.
No I cannot pull mags out without pressing the release button.  When pressing the release they fall right out.   
Thanks and regards...

Well I finally got to do some more testing.  I had the 22# RS in the gun already, and to keep things simple I only took two types of ammo, Armscor and Sig.  Most of the testing was done with the weaker Armscor loads.  In all I shot about 150 rounds.  If a mag functioned well, meaning no FTF's, then I would try the hotter SIG loads.  Also of the 5 mags, I loaded two (Tripp & Chip McCormick) with extra power springs from Tripp Research.  Predictably, the two mags with the heavier springs performed much better.  I think they only had one FTF.  The other three mags (Kimber, Metalform, Armscor), which all had weaker springs all continued to give me the bolt over base FTF's and the live round stovepipes. 

These results were consistent with 3 different RS weights, 20#, 22# and 24# so swapping springs really did not show any change in performance one way or another.  Since I was running out of time... and ammo, I didn't get to try the  26# and 27# RS. 

So this is where I'm at.  I could go ahead and buy 3 more extra power mag springs to see if I can get all the mags to function, but somehow the one FTF with the stronger mag still has me concerned.  So I don't know whether or not to send it back to RIA, or just keep shooting it to see if it settles, but that could get expensive, especially since I haven't tried any of the hotter loads yet.  I do find it strange that the mags that are not working now were performing perfectly before the Cerakote.  Somehow the Cerakote is impeding the function of the mags??   I'll post a few pics on the next post.

Here is the one FTF I had with the mag with the stronger spring.


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Aside from the live round stovepipes, these are the other two types of FTF i had with the weaker mags...
Keep in mind that ALL malfunctions occurred on the second-to-last round of the mag. 



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one more...


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Quote from: Reverendpdp on October 09 2015 09:46:16 PM MDT
Aside from the live round stovepipes, these are the other two types of FTF i had with the weaker mags...
Keep in mind that ALL malfunctions occurred on the second-to-last round of the mag.

Be careful with this one. It looks like the bullet may have set-back. Measure that cartridge and compare it with one out of the box (not yet handled).

That is definitely an issue of the slide heading back forward before the next cartridge has fully presented itself for feeding.  Either from short stroking or weak springs.

Give the gun to another (experienced) shooter and see if they have the same problem. 

Quote from: sqlbullet on October 10 2015 01:54:16 PM MDT
That is definitely an issue of the slide heading back forward before the next cartridge has fully presented itself for feeding.  Either from short stroking or weak springs.

Give the gun to another (experienced) shooter and see if they have the same problem.

Sql
Are you meaning weak mag springs or recoil springs?  I'm not sure why there was virtually no change in performance when I changed to weaker recoil springs.  I thought it would slow the slide down a bit.  I can't imagine having to go even weaker on the RS?   
BTW I did let an armorer take a few shots and he had the same malfunction. 

I would back off recoil springs down to 18.5.  If at that level you still have issues, I would start upping the mag springs.

Also, keep the mags loaded.  I know that sounds weird, but I have bolt over base issues in my Witness full size if I let the mags sit empty when I am not using them.  Keep them full and I have no issues.

After so many possible fixes, I decided to send the gun in to Rock Island. 
I'll let you know what they came up with...

Well I just got my gun back from the mother-ship. It looks like they tuned the extractor, replaced the barrel and link, and replaced one mag...
Would love to understand why??? And how these things created the above problems?.

Since I just received it, I haven't tried it, but am anxious to see if it's really fixed.

Is the extractor like the typical 1911 styles where the bend them to adjust the tension?  Too much tension can hold the casings too long or trap them during extraction...
Whatever you do don't slip ammo into the chamber and let the slide close on the round sitting in the chamber.  The reason is it can bend the extractors or damage them.  Always feed the ammo from the magazines.

The extractor, if not properly fit, will interfere with the case head sliding up into proper position on the breech face.  The easy test here is to remove the extractor and then hand cycle the action and see if it runs more smoothly. 

The second post on this thread has a great photo of an extractor with excessive deflection.

http://sassnet.com/wildbunch/forum/index.php?topic=1083.0

This extractor would benefit from less deflection, a deeper groove, and some bevel and polishing to ease feeding.

The second cause can be the magazine.  Once the cartridge come free from the feed lips, the next round or the follower on the last round, should give it a "pop" helping push the base up onto the extractor hook and in alignment with the chamber.  If the spring is weak this may not happen.  Also, in double stack 1911's, the follower shape may prevent this on the last round.  I had to re-shape the follower in my Mec Gar mag for my Para, and finally just gave up on it.  It is a range mag now, but never a carry mag.