Bolts and headspace

[Orlando]

Two different NOS 65 series bolts, No Go gauge, surprised to see that big of difference in headspace with the same series NOS bolt

[Dave]

What is that receiver you got there?

[Orlando]

What is that receiver you got there?

[timshufflin]

And both bolts perfectly safe.

[Orlando]

And both bolts perfectly safe.

I realize they are safe.
I have used longer bolts before the get a used barrel to headspace ,just found it odd that there was that much differnce between the same series bolts.

[melloman]

That's a pretty big difference to my inexperienced eyes. I would feel much better using the one in the bottom pic but I wouldn't hesitate to use the one in the top pic.

[ordmm]

Oh please,,,post this on the CMP site...should result in a couple hundred answers. LOL

Feel evil tonight after seeing the lengthy discussion on CMP about how to rig a web sling......

Great pics by the way. In a way kinda amazing they could run the tolerances consistantly in the day of hand crank machines versus CNC.

[13Fox]

Please stop using your gauge stretcher just to have something to take a picture of!

[canes7]

There was a write-up in one of Clint McGee's (from FA I think) about measuring the distance it would take for the bolt to close to determine how much more reaming needed to be done. You can apply that equation here to tell the HS difference in the bolts. I really don't think it'll be all that much.

[deputy85]

Someday i may come to regret it, but i quit the headspacing of bolts, now ive only been doing this garand thing for 10 yrs and only been thru about 35 rifles but i never found one that didnt headspace,,sure someday i know i'll regret it,,,