[dakrat]

Tripp Research sells magazine rebuild kits that has stronger spring if you don't want to buy new mags. I believe Chip McCormicks Powermags have stronger spring compared to Wilson's 47D. I am not sure if the Colt magazine you mentioned have a dimple on the follower. as the slide velocity increases from the shorter slide action, the last round in the magazine can shift forward and fudge the chambering. a dimpled follower can help with that. Colt and Checkmate makes them

[ArmoryDoc]

Originally Posted by Troubled Gecko

Weak mag springs is my vote. When was the last time you replaced mag springs?

Usually the last rnd not feeding is a red flag for mag springs due to not having enough tension behined the last remaining rnds. Failure to lock the slide open after last rnd fired could also be an issue for a weak mag spring.

Springs are cheap and they won't go to waste, I'd rather buy em than lose a nice gun over a simple/inexspensive fix. WWW.gunsprings.com Wolff makes great springs, buy the +5% power and your issues will be bye bye.

Good luck.

This is it. All rounds feed ok except the last ? Weak mag spring. Change it out with a +5% Wolff.

[MD357]

Originally Posted by R0CKETMAN

If any of these were the issue it would not be last round only

Not necessarily true.

To those that are thinking it's the mags, did you see he used 4 different mags already? It would be weird for all of them to go weak at the same time. Especially since he's used them with no problems in other 1911s?

[PlasticGuy]

I'd give the builder a chance to fix it. They have a good reputation. They don't want a finicky pistol out there with their name on it.

I would normally guess magazine issues also, but maybe not in this case. Usually mag problems are with the first couple rounds in the magazine, rather than the last couple. Also, you say it is doing the same thing with different mags from different manufacturers. That indicates a pistol problem.

[COLDSTEEL165]

I agree with the other guy's call up Virgil Tripp & order a couple of his great magazines, And a couple of his spring Kits for your existing mags & install them into them. As this will turn in your bad mags into mags equal to the Tripp Mags his Cobra 1911 mags are outstanding & worth every cent of their cost. " WORKED FOR ME 100%"

[R0CKETMAN]

Originally Posted by MD357

Not necessarily true.

To those that are thinking it's the mags, did you see he used 4 different mags already? It would be weird for all of them to go weak at the same time. Especially since he's used them with no problems in other 1911s?

I've experienced the issue first hand recently. I do know that weaker springs / slightly spread feed lips can be exacerbated by lube. So my overly wet gun affected several mags. Each pistol is different. One may "feed" better than others. Those same problem mags worked fine in a different pistol.

Last round only

[okie]

I'm so sorry you're having these problems my friend, I hope you can get them figured out

[Amsdorf]

Sir, my .02.

Exhaust every possible suggestion you are receiving here.

Anytime you have a 1911 that is now that St. Moses invented, you risk problems.

I would put money on an extractor problem or a mag problem.

Respectfully, offered, and as always, FWIW YMMV.

[southernshooter]

Originally Posted by Amsdorf

Sir, my .02.

Exhaust every possible suggestion you are receiving here.

Anytime you have a 1911 that is now that St. Moses invented, you risk problems.

I would put money on an extractor problem or a mag problem.

Respectfully, offered, and as always, FWIW YMMV.

--------------------------------------------------------

Always thought that was kind of true, but only for compact 1911's

[glock2740]

Originally Posted by Amsdorf

Sir, my .02.

Just more proof that you get what you pay for.

[ca survivor]

run it wet for now and see.

[mobilecommand]

Worse comes to worse i will take that POS off your hands... :-)

[MD357]

Originally Posted by R0CKETMAN

I've experienced the issue first hand recently. I do know that weaker springs / slightly spread feed lips can be exacerbated by lube. So my overly wet gun affected several mags. Each pistol is different. One may "feed" better than others. Those same problem mags worked fine in a different pistol.

Last round only

Problem with your theory is that he states they are new or nearly new.

[countrygun]

I would have love it if I had seen this thread earlier so I could have asked, kind of, one question,

When this happens is the The round fully put of the mag and, more importantly, is the "rim" of the round "under the extractor"? that is to say has the round properly risen up the breech face and slid under the extractor hook.

[R0CKETMAN]

Originally Posted by MD357

Problem with your theory is that he states they are new or nearly new.

I've ordered CMC power mags and replacement springs from Brownells. Pulled the "new" mag springs from the mags and laid them next to the replacement spring. Obvious set was discovered so it can happen.


At least I'm attempting to provide thoughts and help vs busting Rocketman's nuts as the only input in this thread.





.

[Arc Angel]

As I remember it: Austin Behlert, Art Leckie, and Bob Cogan, all, used to use 20 to 22# recoil springs in their 1911 builds. I'd suggest you make certain that the recoil spring you're using isn't heavier than 18#'s. I'm NOT suspicious of the magazines; you've already tried too many for the problem to lie there. I don't, though, like a lot of the ammunition you've been using while verifying this pistol. You should stay with expensive, brand new, self-defense quality ammo until the gun comes on line. (I've, also, thought about the feed ramp; but, on a last round jam, it ain't going to be a factor.) Good luck; and, yes, it's a sweet looking pistol.

ADDED: Check the barrel. Are there any dull grayish spots in the chamber? If you know how to use a Dremel Tool (and, that's a big, 'if') you might want to polish the chamber walls. I, also, think talking to Bob Cogan is a good idea. I remember Bob as being conscientious and honest. To my mind, tossing the gun isn't the answer.

[MD357]

I've ordered CMC power mags and replacement springs from Brownells. Pulled the "new" mag springs from the mags and laid them next to the replacement spring. Obvious set was discovered so it can happen.

Not exactly sure what you're trying say here. All I'm saying is that it's weird he got FOUR DIFFERENT bum mags if what you are saying is true, rather highly unlikely.

Originally Posted by R0CKETMAN

At least I'm attempting to provide thoughts and help vs busting Rocketman's nuts as the only input in this thread.

.

Not busting your "nuts"..... in fact I provided some input before you did. (see post #14) Read all the replies my friend. I just disagreed with what you said in reply to another post. Don't like it? Sorry, just going on my experiences and the likelihood of variables here.

[12131]

Update
Brought 3 brand new Tripp Research 8 rd Cobra mags. Shot another 100 rounds today (50 PMC and 50 Blazer Brass). Zero malfunction.
Tried again in 3 Wilson mags. The same malfunction as mentioned above. Like clock work.
I think we (you guys) have solved the problem. Thanks again for lending me your collective brain.

[fnfalman]

Problem solved.

Some guns simply don't like certain mags.

[MSgt Dotson]

Extractor can cause last round problems, as the round is held at a slightly different angle due to the last cartridge having no cartridges underneath it for support....

This would be an inexpensive fix, albeit the replacement will not be hard chromed, and, not match the rest of the pistol, but, stainless would make it not as noticeable.

Besides...every pistol needs a spare extractor!