Accuracy issues with the 39-2?

A Friend and I used to cast hard lead bullets for various cartridges. He bought a 9 mm mold for a 121 grain truncated cone bullet but sized them .355”. Those bullets key holed out my 39-2 and his new Glock 17 Gen 1. I told him to resize the next batch to .357” and he thought I was crazy. He sized the next batch .357” and they shot great. We used wheel weights, added tin from 50/50 solder and dropped our cast bullets into water. These bullets were hard, didn’t lead our barrels and proved very accurate in any 9 mm we tested.

I bought some Xtreme plated 9 mm 115 grain round nose a few years ago. I used too much crimp for the soft lead core which ruined the accuracy of that batch of reloads. I learned my lesson loading Xtreme bullets and used a light taper crimp from then on and those reloads shot decent.

My point is loading for 9 mm requires the cartridge to seat (head space) on the case mouth. The cartridges need to have enough crimp to keep the bullet from deep seating during it’s ride in the magazine into the chamber. I have seen numerous 9 mm bullets that came new undersized which affects accuracy. I’ve got batches of FMJ bullets that size .352 or less.

Not all 9 mm brass is comparable in quality. Back in the 80’s W-W 9 mm brass would rarely hold bullets after being sized. I guess the brass was just soft. It didn’t matter how much crimp you tried to use the W-W brass wouldn’t grip the bullet. We normally discarded the W-W 9 mm brass.

In my experience JHP bullets produce some of the best accuracy in the 9 mm. There is always something to learn when reloading even though we might have loaded ammo for decades.
 
I own about a dozen various 9mm pistols, including a 39-2. The Model 39 is no better or worse than any of them. I used to support over 300 Model 39s for my department back in the 1970s. I have not seen that the model has any issues with being particularly in-accurate. The problem is probably closer than the gun, especially if you have two that shoot poorly for you!
 
Last edited:
Follow-up:
Thanks everyone for your input.
Issue isn’t the pistols.

Apparently the ammo. I’ve been reloading a very long time. Pride myself on what I believe to be a quality and consistent product.
Perhaps not as goods I thought. And of course, some shooter errors on my part.

Went back today with factory loaded ammo.
Fiocchi 115
Fiocchi 124
Remington 147

15 yards, my typical standing two-hand, six o’clock hold (as best I can) on a 2” shoot-n-see target.

I’m quite satisfied with the groups. I think I had a flinch or bobble with the 147. Don’t think the ammmo is the cause of the flyers.

I think I need to re-access my reloading technique for 9mm.
That looks more like what I would expect from the S&W 39/59 platform. Not bullseye competition accurate, but certainly combat accurate.
 

Latest posts

Back
Top