Failure to return to battery, causes? - Pistolsmith
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Old 08-02-2011, 09:57 AM   #1
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Failure to return to battery, causes?

Setup: 1911A1 Springfield Armory with custom fitted Kart NM barrel and bushing, trigger work, 12# spring, ultradot mounted on slide. Has been feeding a diet of 200 gr LSWC over 4.2gr Bullseye at 1.26" oal without any problems whatever. Trying a load to use a large quantity of 200gr FMJSWC (Speer?). Test fired with 4.2, 4.5, 4.8, and 5.2 grns Bullseye. Total OAL is 1.275 (about 1/32 inch of bullet showing between shoulder of bullet and case mouth) Velocity is 741, 792, 803, 872 respectively. 4.2 grain load is dropping the empties right beside me. 5.2 grain is kicking them out about 6 feet behind and to the right. With all three loads, 2 or 3 out of a trial batch of 20 failed to return completely to batter: the round was picked up, carried forward, but the slide wouldn't quite close on it. Partially racking the slide cleared it. Looks like the top of the case mouth is just barely hanging on the barrel.
Anyone got any hints of where to start problem solving? Shorten or lengthen the total OAL of the round? Junk the jacketed bullets and go back to lead (ouch!). Stronger mainspring? Weaker mainspring? I'd like to hear suggestions.
Thanks.
Dave
 
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Old 08-02-2011, 02:20 PM   #2
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Is your OAL what is recommended by Speer?

Is the chamber thoroughly cleaned from the LSWC?
 
Old 08-02-2011, 02:50 PM   #3
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Quote:
Originally Posted by danf_fl View Post
Is your OAL what is recommended by Speer?

Is the chamber thoroughly cleaned from the LSWC?
Speer only markets the 45 TMJ Match SWC (same thing, supposedly but no exposed lead on the base) and they recommend a OAL of 1.275. Brushed the chamber with CLP thoroughly before trying the jacketed load.

Dave
 
 
Old 08-04-2011, 02:32 AM   #4
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How does it work with the original barrel?
 
Old 08-04-2011, 03:23 AM   #5
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What recoil spring weight are You runnin now.....Mainspring can't help it return to battery.....maybe load a little hotter....I don't care how far the brass goes just so it gets out and don't hit Me.....futher the better in most cases ,You may have heard of smiths that can build a pistol that will land all brass in a 5 gal. bucket....I've always called Bull$#*t on that one

Wild Bill
 
Old 08-07-2011, 08:06 AM   #6
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If the weapon will go into battery given a sharp heel of the hand to the back of the slide, I would try a different weight recoil spring.
 
Old 08-07-2011, 11:57 AM   #7
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My first suspicion is ammo. Sounds like there is some level of inconsistency there. If only 3 out of 20 are doing it. If it were the mag, I'd think it would be a more consistent malfunction. Check crimp

Chamber dirty? Rusted? In need of throating? Undersized? All of those seem much less likely to be the culprit. Ammo is more likely.

I think I'd look to the recoil spring next. I believe the factory weight is 16lbs. Call me crazy, but 12 seems awfully light, IMO. I'll be watching this thread, fa sho. I wanna know where this one goes.
 
Old 08-07-2011, 12:58 PM   #8
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Sorry I haven't responded to suggestions lately. Paying work took precedence. I checked the rounds and they measure at 1.275, Speer recommends 1.25 and that could be causeing the rim of the case to just nick the top of the barrel, slowing down the return. Next step is to make a batch to speck on OAL. I'll also thoroughly clean the chamber and mags. Oil is no problem, lots of speckles on my shirt and range pad! I'll report back on the ammo adjustment and cleaning results. Then will look at a slightly tougher recoil spring.

Thanks. Stay tuned for the results. I WILL find a solution!
Dave
 
Old 08-07-2011, 01:12 PM   #9
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AlleyB.....Any an all of Your solutions could be the right one....I once watched a FAT SMART ASS show a pistol club how stupid He was when the problem was bad reloads , He's a self proclaimed gunsmith , a worthless SOB, the one that did the work on a slide I showed on here a few years ago and had reloaded the ammo.....My pistols will all work with lighter recoil springs than most run.....can't say why...I use the firein pin stop to slow the slide down in its rearward run so if the recoil spring will chamber the round that is enough for me....May be just Me but in Louisiana 10 months out of every year My hands are wet and sweaty , grab a slide to rack it, have it slip in Your hand and that Bo Mar open a Gash like the one belongin to a Carilina gal named Rosey Rottencrotch , a lighter recol spring might be the answer

Wild Bill
 
Old 08-07-2011, 04:04 PM   #10
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Wild Bill, I don't claim to know anything other than how to follow instructions, and that has got me in trouble more times than I want to admit. So, with all that you and others have suggested here, I got a Wolff recoil spring tuning kit and will follow those instructions to see what I can come up with.
 
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