Norc 1911 in 7.62x25

Ganderite said:
The milsurp ammo that was 25 fps faster was full charge ammo with the bullet pushed in about 100 thou......
Click to expand...

Given what I know about reloading and how pressure is related to how deep the bullets seat I'd say that pushing in the bullets in this manner is not a wise idea. So anything you can work out which lets you push the bullets in to a lesser degree is worth trying.


One fellow I shoot with had a 1911 blow up during his early days. He told me that the shots got progresively stronger over the course of the mag until KABOOM! When they started looking for a cause one of the fellas noticed that the bullet crimp was light and that he could seat the bullet deeper with a firm thumb push. The final thought based on the continuously higher recoil impulses just before the KABOOM! was that he was getting severe bullet setback in the casings and resulting higher case pressure. It's that story that is making me suggest that you watch how this goes.

On the other hand a mere 25fps gain in velocity suggests that there's a lot of air space inside the casing of the loaded ammo and that pushing the bullet in that far did not result in all that big of a relative change in volume. The same thing applies when comparing 9mm to .38Spl. In 9mm the case volume is so small moving the bullet even a little causes a big relative percentage change in volume. And along with that a big change in the chamber pressure. A person can easily exceed the SAMMI max pressure just by pushing the bullet in too far even if the weight of the charge is to spec otherwise. On a .38Spl with the large casing the same amount of change in bullet seating might not even be noticable on the pressure charts and chrono.
 
I am having some problems making ammo for this pistol. The bullets have to be seated deep, but they curve too much and pop right into the case. I need a very abrupt curved nose, or a semi-wadcutter with a very short nose section.

Rummaging around the bullet shelf, the best I could find was some full wad cutters. They have be seated way into the case so that the bullet does not hit the rifling. OAL is 1.090.

The surprising thing is that because they are bottle necked, they feed just fine. I have not yet shot them for accuracy. Will do that tomorrow. 5.3 gr of Unique gives 1250 fps. and cycles the action just fine. No recoil.

tokwc.jpg
 
Ganderite;

Would a Lee Factory Crimp Die help ?

Modifying the die to crimp the neck of the case down from the mouth, or perhaps using a .30 Luger Lee Factory Crimp Die.
 
Last edited:
The problem is that I cannot crimp onto a curved section of bullet. I need a cylindrical section. Once I seat the bullet past the cylindrical section, it just falls into the case.

I shot the first batch of wad cutters today. They fed just fine, but shot poorly. A lead bullet at 1250fps might be too hot.

They were sized .311 (for 32 Colt) I am in the process of re-sizing some to 308 to see if that helps. I am not hopeful.

Next step is to try the same bullet cast with a harder alloy. I will also reduce the pistol recoil spring so that maybe I can reduce the powder charge and velocity.

I am looking for a cheap bullet I can seat to a max OAL of about 1.260". I was looking at some plated 110 gr M1 Carbine bullets. The nose section is too long.

I have some 75 gr FMJ 32 ACP bullets. They will probably work, but FMJ costs more than lead or plated.

This is a fascinating hobby.
 
OK, installed a 12 pound spring, replacing whatever Norc use for 9mm. It feels lighter.

As a result, was able to reduce powder charge from 5.5 to 4.5 gr of a Unique-like powder. These eject 100%, but just barely. I will use 4.6 instead.

I sized the wadcutters 308. This makes them easier to seat in those little cases. I shot 5.0 and 4.5. the 4.5 was somewhat better, telling me that those wadcutters are at their velocity limit.

matchammo1.jpg


I now have a bullet and a load that works. I have asked R & R for a box of hard cast wadcutters, sized 308.

My Norc 1911 is now a very accurate pistol in 7.62x25, using cheap handloads. next step is to put the original recoil spring back in, or a heavier one, plus a heavier hammer spring, and try it with milsurp ammo that has the bullet pushed deeper. The need for a milsurp shooter is not high, though, because my Polish Tok shoots very very accurately with the milsurp.
 
Last edited:
I expect that the bottlenecked round is a real advantage when it comes to feeding things like wadcutters.
 
What I was suggesting is to move the crimp down the neck of the cartridge.

Some military cartridges have a dimple crimp at the middle of the cartridge neck.
 
You must log in or register to reply here.
Back
Top Bottom