Ideal head space dimension for .22 lr chamber

[FilippoMo]

I am a free rifle shooter and would be very interested to know what is considered to be the optimum h chamber head space dimension.
Sincerely
Filippo

 

[Robert]

Filippo,

According to my Triebel CIP gauges, 1,04 to 1,23mm.

R.G.C

 

[FilippoMo]

Thank you,
those provided are the specification for headspace,that have been modified by CIP with a minimum chamber now at 1.09 + .2.
However my question was a bit different I asked what the ideal head space measurement should be,independently from the fact of proof
submission).Let say the cartridge rim is 1.06,after selecting the ammo)
what would be the best set up for accuracy?
Sincerely
Filippo

 

[Robert]

Filippo,

As I understand, you have the CIP datas sheet for the calibre.

According to Triebel, there is an other chamber dimension that they named 'Match',SAAMI), in which:

lenght L3= 20,78mm
Dia H2 = 5,77mm
Dia F = 5,51mm
lenght G = 1,45mm
throat angle = 5°

Used in the past a reamer on those dimensions, and bullets engges the throat rather tight.

PM me if yu want the data sheet.

FWIW
R.G.C