M1 reload fail

[International Harvester]

So I was working my way down through McCann gas plug screws and when I used 3/5 screw, it started cycling. However shot 5 of 8 failed to feed properly. The bolt didn't close fully, with the bullet stuck in the throat and the cartridge rim sticking out on an angle with the bolt stopped short of battery. It bent at the neck down portion of the cartridge. So the rear of the cartridge was sticking out like a stove pipe eject. I'm wondering if this means I need to move to the smaller gas plug screw or is this a failure caused by the en bloc clip or anything else.

Oh I should mention I was working my way through the gas screws that would cycle commercial federal blue box 150 grain soft point 30-06


Regards

IH

 

[zuke]

Repeat the same sequence and see if it happens again. If it does, you'll have your answer

 

[International Harvester]

It did manage to fire the remaining cartridges and ping the clip out when I cleared the jam. Are these kind of feeding jams common with a regular plug and m2 ball?

 

[M1-Garand]

It's almost like it is short stroking,try a smaller plug.

 

[International Harvester]

Tried the next smaller McCann screw #4 of 5. Cycled all 8. Not sure if it's too much oomph on the action or not.

 

[sail32]

Did the cartridge bend at the neck ?

Was the bullet at an angle from true ?

 

[International Harvester]

Sorry Sail32 I just saw your comment. Yes the cartridge bent at the neck. The bullet was part way into the chamber cone and the rear of the cartridge road up over top of the bolt, jamming at a bent angle.

 

[International Harvester]

Yes after jamming the bullet was at an angle from true and unusable for all intents and purposes.

 

[sail32]

Most military weapons have a strong crimp so they will function through semi and full automatic weapons.

I put a heavy crimp on my .30-06 cartridges for my Garand using a Lee Factory Crimp Die.

 

[International Harvester]

Are you referring to the case rim? I don't reload so I'm not sure what the crimp is.

 

[International Harvester]

I'll compare the federal cartridge to a DAC 1955 cartridge.

 

[AikiNut]

Are you referring to the case rim? I don't reload so I'm not sure what the crimp is.

The crimp is where the case gets pinched into a little groove (cannelure) in the bullet after the bullet has been pushed to the right depth into the case. Purpose: keep the bullet in the same place for consistency of length and pressure; help seal against moisture, to name two

 

[jonh172]

Is there such thing as too much oomph with 150 blue box in a Garand that cycles properly??

Sounds like you fixed the issue the smaller plug.