NOSHMJ

I have found on the 750, that the priming cup gets crap build up inside along the pin that it sets on, preventing it from fully returning up. You can tell this by watching to see if your primer coming out of the tube sits really high on the carrier. Take the primer cup out, losen the set screw and remove the carrier cup and clean the pin. That will help.

Just a very light crimp on mine. Lee FCD also.

I had a very similar issue. New mag and problem solved. I was using a glock mag with MBX extension. I change to new mags and springs every season now because I learned the hard way. Take a new mag spring and compare it to your old one and I bet you will see a difference in length from compression.

I use it for my Limcats. KKM Tungsten sleeved.

nice to hear

I use 7.4 grn under a 124grn for 9mm major

I use the Lee Universal decapping die, and have busted multiple pins with that. I found a set of aftermarket replacement pins on Ebay and have had very good success with those. With that said, I also have a separate tool head I decap, and resize. Then when its time to load, I swap tool heads, and I have another decapping die in station 1 to make sure flash hole is clean, then load normal from there.

I ran 147 Blues under 6.2grn of PowerPistol. It worked well enough for what I wanted out of it. Its not the 124s you are looking to use, but may be a starting point.

Try a SB resizing die.

I have had very good success with Hornady 140 ELD match bullets. H4350 is the go to, but also have had good results with Varget. I have the Redding dies, and have gone to 650yds with ease.

PowerPistol works really well foe .380, and 9mm. A little dirty, but never had an issue with it.

I use Slip 2000 up here in NH all year, granted there isnt any matches after Dec, but Jan and Feb practice, the gun runs perfect.

I find the MPX, well at least mine, loves the 150+ power factor.

I have the DVC steel, and I run minor power bullets with zero muzzle flip all day long. As far as the extraction issues, I just tuned my normal exractor, and its about 99% reliable. Id say make a few different loads with different bullet weights/powder combos to see what works before you change barrels. You may also try swapping recoil springs to see if any improvement comes from it.

I ordered from Gallant 9/18. I finally got a hold of someone who told me an additional 3-4 weeks from 2 days ago.

I guess it was worth asking...

Ive ran thousands of coated bullets thru my MPX, without a single hiccup, or failure. I run 147 Blues under 4.0 grn of power pistol. I clean the gun after about 1000 rds. Scrub the piston and piston chamber clean with a brass brush. I run my bolt sloppy wet against peoples recommendations, but it has yet to fail. I do carry spare extractor springs and the little rubber washers with me because they are going to fail. The thing feels like a shooting a rimfire.

Wondering if anyone has any info on this? Canada has lots of primers for sale, but we can not ship them here legally to the US. So can we just take a day trip up there, buy a cpl thousand, and drive em home???

Limcat uses the 4 leaf springs in my Razorcats, so I'd have to think they are good enough.....

Another vote for AutoComp. Powder is readily available in the Northeast. Its primers you cant find. CFE Pistol is another good choice when AutoComp is running low.

I have 3 slides for this gun.. a 9, .40, and the pictured one. Its an all around fun gun.

I have the MBX minis and just download 1. No issues. Replace springs every season and itll run forever.

Poor mans X5. 226 Legion SAO with equinox slide, X5 comp. Skeletonized hammer, alluminum grips and magwell.

I have it in SAO. The gun is just a machine. I have 3 slides for it, 9, .40, and a 9mm slide with romeo on it. All 3 slides run perfect, and the gun is a tack driver.

Its usually the grips need a little material removed from the inside. Its probably rubbing on the mag, not allowing it to drop free. However, I only use the MecGars for my 226.