I know this might be hard to answer, since all 9mm ARs vary so much in build set-ups. But I'm looking for recommendations for those who have run hollow points and what has been more reliable for them? I've only tried GECO hollow points thus far in my gun, and it gets failure to feeds. Jams up every few rounds when feeding into the barrel and pushes the bullet into the case.

Here's the style of the GECO hollow point. To be honest, I'm not too familiar with different types of HP since I rarely have used them.


Any ideas?

Gun runs flawless with FMJ ball brass or steel. 600rds fed through it on FMJ. I'm using a promag magwell. The magwell has a feed ramp, but the barrel does not. Using promag mags as well. Metalform/Colt steel mags cause FTF with everything I've put in it so ditched those.

Speer G2 147 Gr.  has been 100% for me.  All QC10 parts.

Hst runs fine in mine

HST or critical duty/critical defense.

Hornady

HST for me, too.

I have a RRA LAR 9 10.5" pistol and it's been flawless with both Hornady XTP and Remington Golden Saber hollow points.

The GS hollow points have a fairly round nose profile, while the Hornady XTP hollow points in 9mm have a profile that is closer to a truncated cone with a mid sized meplat.  That narrow design feeds very well, and at 7-10.5" velocities expands white well.   1150 is about average for the 124 gr, and 950 is average for the 147 gr in my 10.5" barrel, and that's a couple hundred feet per second above the minimum velocity needed for reliable expansion - enough to ensure expansion out past 200 yards -  a bit beyond the real world effective range of a 7-10.5" 9mm pistol or SBR.

One major advantage of the XTP bullets is that they are highly regarded for their accuracy and with an optic, I get 3/4" five shot groups at 50 yards with my LAR 9, and similar 1.5 MOA accuracy at 100 yards if it isn't gusting.

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The RRA uses Colt pattern converted Uzi magazines, but the lower has a dedicated mag well for 9mm mags with integral feed ramps, and a normal feed cone around the chamber.  The general design is the same as the Colt pattern, but with no potential for a magazine block to slip or shift.

I have an Olympic Arms 9 mm, it will feed anything you put it, flat nose to hollow points, operates flawlessly.  I think it has to do with the way the rounds feed out of the magazine, almost straight into the chamber.  Not a favorable magazine, but works anyway.  Also will feed out of a sten mag if you use a Hahn block.

Well...there's a thread on the 1st page where the guy tests like 120 different types of ammo.

May be something there you could use ??

https://www.ar15.com/forums/t_3_15/712317_16-9x19-AR15-Carbine-Chrono-Test-----129-different-rounds-chronographed--Added-more--7-May.html

http://www.ar15.com/forums/t_3_16/712312_.html&page=1&anc=7429025#i7429025





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From a reliability viewpoint ( and accuracy), the Federal 115 grain 9BP load is my all-time favorite.  It runs well in all of my pistols and Colt carbine.

My setup using a JP SCS and Bolt with a Hahn top loading block and a barrel from Rudy over at Macon Armory will shoot absolutely everything I have thrown at it including magazines full of mixed brands (Freedom Munitions, Winchester, Browning), weights (115, 124 and 147 Grain) and types (RN, HP, TC).  I tried, I tried hard, I literally couldn't make it fail.