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Need some info on the reliability of 124 gr. FMJ 9mm feeding and ejection in a 1911 design pistol.

2.5K views 28 replies 18 participants last post by  Condorcet  
#1 ·
Saw a comment somewhere a while back either on this or another forum that said "A 9mm in a 1911 is like dating your sister. It just isn't right."

Anyway, due to that comment, I'm asking about the 9mm cartridge for a "friend." .

The "friend" is concerned about feed ramp geometry, potential extractor issues and magazine design issues one might run into with with using 9mm, even in a 1911 which comes from the factory as a 9mm.

This "friend" uses only 230 FMJ ball ammunition in his current Tisas Service model 1911. (Remarkably this "friend" is of the same opinion as myself, that since ball ammunition is reliable enough for the military, then it's just the ticket for any other military caliber, such as the 9mm.) The "friend" wants to "experiment" with switching things up and using 9mm in a 1911 design pistol because he's familiar with the manual of arms of the 1911. The friend isn't (yet) into orgies with double action pistols of any caliber.
 
#3 ·
I’ve had problems with hollow points and flat points nose diving from the MecGar mags that came with my Tisas US Army Model in 9mm. Loading them completely, and letting them set, helped the problem some, and they will now cycle and function if the first round doesn’t nose dive. Had no problems at all with factory FMJ. I’m buying some 10 rnd mags with a different follower for hollow points.
Funny thing is, the .38 Super barrel and mags work great with the same hollow points and flat points and the mags are also MecGar with the same style follower as the 9mm mags?!🤷‍♂️
 
#6 ·
I'm just not a believer in the utility of non FMJ ammo. Fired a 38 Special hollow point at a 3/4 inch particle board desktop as a test back in the day. The bullet penetrated only about 1/4 to 3/8 of an inch before fragmenting and not penetrating any deeper.It was a Winchester Silbvertip, I believe it was called. I''d rather drill a hole with an FMJ.
 
#7 ·
One thing to realize about the 1911 is the slide is the same, whether it is a 9mm, .38 Super, .40 S&W, 10mm, or .45 Auto. The slide was designed for the recoil of the .45 Auto. The round has to drive the same slide regardless of caliber. Note the size difference between a G21 and a G17. Anybody shoot 9mm out of their G21?

Of the rounds I listed, the 9mm has the lowest recoil of all those rounds. Usually, the weakest 9mm ammo is the low cost ball ammo in 115gr weight. Folks shooting cheap, 115gr ball ammo often have problems. Usually, 124gr works fine.
 
#8 ·
Lots of speculation on over-penetration, ricochet, etc. I don't have any hesitation to carry fmj for sd.
My new favorite carry is a Tisas Gen2 PX-9. Striker fired 9mm 20+1 running Sig P226 mags. It will eat anything, in any order, all day long.
 
#12 ·
I've got two Tisas 9mm, 1911's, a Sting Ray, and a Tank Commander. I know I've fired both with 115 and 124 grain bullets. Flat nose, round nose, and a couple of different hollow points. The Sting Ray has seen a bigger variety of bullet shapes, but the TC has seen a couple too. They both work just fine. No failures to feed with either magazines (the ones tha came with the guns, the only ones I have) either when shooting or just feeding the rounds into the chamber. I had a couple of failures to extract with the TC, but they were when (1) the gun was dry as a bone, I had forgotten to lube it, new out of the box, and I was using my reloads which are loaded toward the light end of the scale. With factory ammo neither have bobbled at all.

I like my 9mm 1911's better than I do the P-35 High Powers I've had over the years, and that surprised me. I was always pretty fond of the Hi-Power. Still am really, but I don't have one anymore. I suppose the 1911's come up a little short in the magazine capacity catagory, but not much else. I've got Glocks and such if magazine capacity is important.

I shot one of my 45's the other day and realized that those things do kick pretty good. The 9mm is a lot more plesant for me to shoot. I'm old, and that's become more important to me now. The ammo is a lot less expensive too. I'm not getting rid of my 45's, but I've learned to be "bi-caliber" when it comes to 1911's.
 
#15 ·
Winchester defender 124gr in 9mm, will not run in most magazines, especially stock Tisas magazines.
If you think you own a gun that “eats everything “
Try that round….lol even cobra mags nosedive the first few.

steve from Allentown, listed a few times here a mec gar 9mm magazine with a little ramp in the front of the magazine, that is the only magazine I have found that will run that round.

So far I have not had any issues with that magazine, and defender 124 gr, but it’s not like I shoot 100s of rounds of expensive sd ammo, really had issues with that round in 9mm, yet is my favorite 45acp sd round.
 
#20 ·
Tell your " friend " the 9mm in a 1911 was first placed into production in 1950 with an alloy frame .. So what do you really think about a 9mm 1911 that some reading would not have coverd ,, I mean your "friend " ! . My wife's rural county carry is a kimber ultra II 9mm that has just short of 3000 rounds fired with 100% reliability mostly with coated 125gr swc but she prefers to carry it with 147gr hst or ranger t-series ammo that are also reliable . Theres HP bullets also expand very well in short barrels .

Oh yea your "friend " only uses ball ammo in his 45? Thats sad and hope he never meets anything determined to do him harm . I mostly load and fire SWC bullets for practice in my 9mm , 40sw and 45 along with 357mag too but all get HP bullets for thin skinned dangerous 2 legged types like hst or ranger t series even in my colt lw commander on my side .
 
#22 ·
Oh yea your "friend " only uses ball ammo in his 45? Thats sad and hope he never meets anything determined to do him harm .
You're possibly right, I must confess.

The Germans probably were rather well meaning when my father was in the service there back in the day. The Soviets probably were rather well intentioned during my own service. :)
 
#23 ·
The "friend" wants to "experiment" with switching things up and using 9mm in a 1911 design pistol
Tell you "friend" that he's more likely to have trouble with his favorite pair of pliers than most 9mm 1911's.... and a 1911 in 9mm can be sold in about 90 minutes if "he" is dissatisfied.

I've run thousands of 124 JHP's and many thousands of 124 gr FMJ's through mine without a hitch.
 
#26 ·
Saw a comment somewhere a while back either on this or another forum that said "A 9mm in a 1911 is like dating your sister. It just isn't right."
I agree, it's perverted. I'd use a FEG or HP or a P-38 or even a Luger.

That said, I love 124gr and 130-135gr from my FEG's. I never invest in 115's and I do have a pile of 95gr bullets that are fun plinkers.

You can get your 9mm in hollowpoints, coated, lubed or jacketed. Flat nosed, round nosed - they'll all work fine, unless you plan to shoot up houses and armor cars.
 
#29 ·
If the mainstream media is to be believed the Russians are doing fairly well with entrenching shovels - seeing as how all the mainstream news media says they are out of ammunition. They seem to be adept at bringing down Reaper drones and taking territory using those shovels, without resorting to firearms. :D