10/22 headspace

Geri

May 05, 2019 09:06

I have read that in the past some smiths have ground the bolt face on the 10/22s
to .0400". I thought that match headspace for a 22 lr was .0425". Would reducing
.0025" cause a slam fire? I have a used 10/22 That measures .0400 and it functions
well. Very accurate. Thanks.

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  babun

  May 05, 2019 10:20

  The biggest problem with the .22 head space is the ammo.
  In our BOLT+ACTION target rifles we set the headspace tight.
  But we measured the rim thickness of the ammo we used. It varies a lot even among the same brands.
  Slam fires even with a semi-auto banging the shells into the chamber would be almost nonexistent. A decent dent in one spot of the rim is needed to set off the primer mixture.
  I'm sure you have had some misfires that went bang after a second hit of the pin in many guns.
  If you want accuracy, set the headspace right, it will give it to you.

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  MIKE WISKEY

  May 06, 2019 08:26

  "Slam fires even with a semi-auto banging the shells into the chamber would be almost nonexistent.".............not totaly true, I've had semi-auto's that would 'slam' fire on occasion with certain ammo. rim thickness is important.

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  llama

  May 09, 2019 18:30

  MIKE WISKEY wrote:

  "Slam fires even with a semi-auto banging the shells into the chamber would be almost nonexistent.".............not totaly true, I've had semi-auto's that would 'slam' fire on occasion with certain ammo. rim thickness is important.

  
  Indeed I know it is time to clean my Ruger Mk II when it starts slam firing or giving other OOB symptoms

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