Part 9 Head Space and Ammo
In my last post you saw the target I did with ELEY CLUB, to me the consistency wasn’t there yet. I what to be able to pull groups with this cheap gun no one thought would be possible. So I keep trying to improve its accuracy.
So now I’m moving onto rim thickness of different ammo.
This gun has a sporter chamber that will accommodate any ammo you can buy.
This means it has a large head space.
We'll start with Eley Contact
with rim of .038
Eley Club
with a rim of .038
Eley semi-auto .22 benchrest precision
with a rim of .039
Now we'll move over to some common bulk ammo to see rim thickness
CCI Standard Velocity
with rim of .042
Agulla SuperExtra
with a rim of .041
And the last
Norma Tac-22
with a rim of .041
From this we can see the variation in the rim thickness
And I have tried the CCI at .042 and had no difference in closing the bolt handle, this leads me to believe that they're still more headspace in the bolt
From here I am going to make a bolt shim that does not exist for the gun and tighten the ammo to the breech face