SA RO Elite Operator 9mm - First 600rds - 1911Forum
1911Forum
Advertise Here
Forum   Reviews   Rules   Legal   Site Supporters & Donations   Advertise


Go Back   1911Forum > >

Notices


Reply
 
Thread Tools Display Modes
  #1  
Old 01-29-2020, 01:22 AM
NHoxworth NHoxworth is offline
Junior Member
 
Join Date: Jan 2020
Location: Ohio
Posts: 32
SA RO Elite Operator 9mm - First 600rds

So, in the Gunsmithing/Troubleshooting section I had a long post about tuning a new WC extractor for this SA RO Elite Operator in 9mm. Today was it's first 600rds, and it was sloppy outside here in OH. Good news was I had the whole range to myself.



First things first. 10-8 live fire extractor test. During this, which I'm sure uou are all famliar with here, it passed with flying colors. No malfunctions. Normal shooting position had brass falling at about the gun's 4o'clock a few feet away. That seems right.



Second thing, accuracy test. This target was 10yds. This is about the average size groups I was getting. I seemed to always throw one, though. I did have to adjust my rear sight slightly, luckily I remembered my sight pusher and was able to do it right there at the range.





With those two things out of the way, time to just start sending rounds down range. I only had 115gr Winchester Whitebox and Sellier Bellot 150gr subsonic. I only shot about 50rds of the S&B, but no hiccups. Then on to the Winchester White Box. I was loading 7rds per magazine, x4 magazines, and doing reload drills. this meant that every 7rds, one of my Chip Mccormick 10rd mags was falling into the soupy OH mud pictured above and below.



After about the 5th reset of the drill, I could no longer get the slide to lock back on an empty magazine, even while manually racking the slide. (I'll also say my 9rd Springfield mags behave the same way). Slide did not lock the rest of the day. After cleaning the gun and magazines, slide will now lock back manually with CM mags, but still not Springfield mags. I'm guessing just too much grit for the follower to overcome? Never had a problem getting rounds to the feed lips though.

Early on, I experienced one failue to fire. It was the only one of the day. Light primer strike, or hard Winchester White Box primer? What do you think? It fired the second time through the gun.



After about 400rds, I started getting frequent (3-4 times per magazine) failure to feeds. These occured both by not having anough power to strip the round from the magazine (5% of the time) and by not quite getting the round to fully seat in the chamber (95% of the time). I know this gun has a tight chamber because it will not chamber my reloads when it is sparkling clean. I'm thinking maybe I'll send this out to have it worked on and hopefully it reduces malfunctions?

Rounds 400-600 were all painful, requiring a smack to the rear of the slide 3-4 times a magazines and every reload requiring manual cycling of the slide. at 34 degrees F., my fingers were feeling some pain an the rear sight doing this so many times.

All in all, I don't know what to think honestly. I severly handicapped the day against the gun by immediately dropping all my magazines into the mud. I'm not sure if the feed issues related to fully seating the round in the chamber were becasue some of that mud had made it's way toward the chamber, or if general dirt and carbon from firing lined the chamber and made it even tighter than it already was, or if the recoil spring lost all it's momentum just trying to strip the round from a filthy magazine. Because of this, I guess I'll have to run the test again without dropping the mags. Either way, it preformed worse than the P10C (which didn't care at all about the mud) but that's to be expected I think. What do you think?




Last edited by NHoxworth; 01-29-2020 at 01:48 AM.
Reply With Quote
  #2  
Old 01-29-2020, 06:18 AM
Rwehavinfunyet Rwehavinfunyet is offline
Senior Member
 
Join Date: Mar 2014
Location: Florida
Posts: 7,708
Shooting and testing guns.....

I don't like to drop my magazines on the ground if it is sandy or wet....

I often bring a blue plastic tarp, which measures about 5ft X 8ft, and has grommet eyelets around the perimeter so I can use aluminum roof gutter nails to anchor the tarp from blowing around.....

I stand at the left front corner of the tarp, so when I conduct a reload, it will fall on the tarp and not on the ground. My empty brass stays on the tarp, so it is easy to gather up the tarp with the brass and condense the brass into a pile which is easy to pick up..... The outdoor shooting range I use has grass but sometimes it needs mowing....and it is a challenge to find my brass without using a tarp.....
Reply With Quote
  #3  
Old 01-29-2020, 08:34 AM
Steve in Allentown Steve in Allentown is offline
Member
 
Join Date: Sep 2010
Location: Allentown, PA
Posts: 1,811
Quote:
Originally Posted by NHoxworth View Post
Early on, I experienced one failue to fire. It was the only one of the day. Light primer strike, or hard Winchester White Box primer?
You've got some cool toys.

So the extractor issue has been fixed

Now you've experienced a light primer strike. Springfield uses titanium firing pins and seriously heavy mainsprings (hammer springs). This is what you need to do to solve the light strike problem:
  1. Throw away the TI firing pin
  2. Drop in a new steel firing pin of the correct diameter
  3. Throw away the factory mainspring (hammer spring)
  4. Drop in a new Wolff 23lb mainspring (hammer spring)
  5. Throw away the factory firing pin spring
  6. Drop in a new Wolff extra power firing pin spring
Voila! No more problems.

Quick note. I don't know off the top of my head but someone here knows the diameter of the firing pin needed. You should be able to find it doing a search in the gunsmithing forum. Alternatively, you can measure the firing pin hole opening in the breechface using gauge pins.
Reply With Quote
Sponsored Links
Advertisement
 
  #4  
Old 01-29-2020, 09:06 AM
NHoxworth NHoxworth is offline
Junior Member
 
Join Date: Jan 2020
Location: Ohio
Posts: 32
Quote:
Originally Posted by Steve in Allentown View Post
Quote:
Originally Posted by NHoxworth View Post
Early on, I experienced one failue to fire. It was the only one of the day. Light primer strike, or hard Winchester White Box primer?
You've got some cool toys.

So the extractor issue has been fixed [IMG class=inlineimg]https://forums.1911forum.com/images/smilies/rock.gif[/IMG]

Now you've experienced a light primer strike. Springfield uses titanium firing pins and seriously heavy mainsprings (hammer springs). This is what you need to do to solve the light strike problem:
  1. Throw away the TI firing pin
  2. Drop in a new steel firing pin of the correct diameter
  3. Throw away the factory mainspring (hammer spring)
  4. Drop in a new Wolff 23lb mainspring (hammer spring)
  5. Throw away the factory firing pin spring
  6. Drop in a new Wolff extra power firing pin spring
Voila! No more problems.

Quick note. I don't know off the top of my head but someone here knows the diameter of the firing pin needed. You should be able to find it doing a search in the gunsmithing forum. Alternatively, you can measure the firing pin hole opening in the breechface using gauge pins.
Thanks for those suggestions. I'll definitely look into the firing pin and springs!
Reply With Quote
  #5  
Old 01-29-2020, 11:41 AM
NHoxworth NHoxworth is offline
Junior Member
 
Join Date: Jan 2020
Location: Ohio
Posts: 32
More technical bench testing here to diagnose failure to fully chamber rounds: https://forums.1911forum.com/showthr...2#post13051522
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

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 01:08 AM.


NOTICE TO USERS OF THIS SITE: By continuing to use this site, you certify that you have read and agree to abide by the Legal Terms of Use. All information, data, text or other materials ("Content") posted to this site by any users are the sole responsibility of those users. 1911Forum does not guarantee the accuracy, integrity, or quality of such Content.

Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimisation provided by DragonByte SEO (Lite) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Copyright 2015 1911Forum.com, LLC. All Rights Reserved