Did you allow the slide to slam home under full recoil spring tension each time or did you "ride the slide" forward with your hand in contact with the slide?

 

This happened during shooting. The mags were loaded with 7 rounds and inserted each time, with a round previously chambered already in the gun.

So I would eject the mag after every shot and put in another mag loaded with 7 rounds.

Wouldn't it tell you more if you just went and shot a couple thousand rounds out of it?

I don’t have enough of the expensive ammo to test or the time.

The full session:

25 cycles of hst with 1 round of hst loaded: pass

25 cycles of hst with hst in 7th position. 2 ftf, almost chambered, round in front of extractor. colt magazine

27 cycles of hst, with hst in 7th position w/ colt mag isolated. passed

10 cycles of hst in 4th position: pass

5 cycles of hst in 5th position: pass

5 cycles of hst in 3rd position: pass

5 cycles of hst in 2nd position: pass

50 rounds of magtech 230gr. rapid fire w/ reloads: pass

This took only 100 rounds of the federal HST versus at least 350 rounds of it if I wanted to know how it fed from a full 7 round mag for fifty cycles.

Edit: I only do this for 1911’s. My other pistols are classic sigs and glocks. I find that the bullets hit the feed ramps at a more consistent spot and angle with those double stack magazines, so I just shoot the snot out of them to test.

 

Wouldn't it tell you more if you just went and shot a couple thousand rounds out of it?

Sent from my Pixel 2 using Tapatalk

 

Yes, this sounds like a mag losing control of the round. Evidence seems strong that it was that one bad mag.

 

Yup, sounds like a bad mag that's allowing inertia feeding. Replacing that mag's spring with an extra power Wolff is often the recommended fix.

Or, the feed lips on that mag may have spread too wide to keep the cartridge inside until the slide pushes it out.

I would add that if the follower is hesitating at the critical moment an inertia feed can be induced. Also, if the magazine catch extends too far into the mag well, the mag spring can hang up on it resulting in the same problem.

You can just toss the offending mag into the trash or you can diagnose it to determine if the follower is hanging up inside the tube. To do this completely disassemble, clean, and dry the magazine. Then put just the follower back into the tube. Slowly push the follower down and up the tube to see if it hesitates anywhere. If the mag has a welded baseplate simply tilt the mag at a 45 degree angle back and forth to see if the follower will travel the full length of the tube by gravity alone.

 

Thanks guys. I have marked the offending mag. Might come around to fiddling with it later but will not carry or it use in anymore function tests.

Will buy more of those 7 round cobra mags since they seem to feed pretty well.

Will continue to test after I put in a new extractor and FPS.

I was detail stripping it the other day after bringing it home, found that the factory mim (??) FPS was cracked all the way through from the top of the part down to the firing pin hole.

Totally justifies my OCD! B)

 

I was detail stripping it the other day after bringing it home, found that the factory mim (??) FPS was cracked all the way through from the top of the part down to the firing pin hole.

A perfect opportunity to fit an EGW flat bottom firing pin stop.

 

Also, check out Harrison Design. EGW and Harrison are FIRST CLASS parts. Can't be more highly recommended.

shop.HarrisonCustom.com
www.HarrisonCustom.com

 

Thanks,

I got the Harrison part backordered on brownells.

I think the more generous frame ramp-barrel ramp gap helps this one feed the HST’s much better than my colt, which has none.

Bought a Wilson BP-XS extractor and Wilson 9mm firing pin for it.


After I get the feeding and slide parts squared away, I plan to upgrade the slide stop, small pins, and send it off to install a Harrison retro ignition set.

I love sleeper 1911’s!