Anyone have Forster Head Space Gauges? I have a couple new 30-06 gauges that I bought for a project that I'm going to be doing.
Problem is, I think the No-Go gauge is not quite right. it's marked 2.0547, because the Forster gauges use a different datum line than other brands. I have checked known good rifles against this No-Go gauge and they all fail.
Remington 721 30-06, closes fully on No-Go gauge
Remington 700 .270, closes fully on same gauge
Remington 700 25-06, almost new rifle, closes fully on the same gauge.
I made .001" and .0015" shims out of SS shim stock and tested all 3 rifles again with each shim separately installed, with the .001" shim added the bolt is stiff to close, I could close it all the way but I did not. With the .0015" shim installed the bolt has a positive lockup well before closing. All three rifles are virtually identical.
I have been unable thus far to get an exact measurement on the diameter of the shoulder at the datum on the No-Go gauge. but just the fact that all three factory rifles are identical with this gauge leads me to believe that the gauge is not quite right.
What do you think? Right now I'm leaning toward returning it.
Guess I'll have to make a jig that I can install the gauge in to get an exact measurement from the datum line on the shoulder.
Problem is, I think the No-Go gauge is not quite right. it's marked 2.0547, because the Forster gauges use a different datum line than other brands. I have checked known good rifles against this No-Go gauge and they all fail.
Remington 721 30-06, closes fully on No-Go gauge
Remington 700 .270, closes fully on same gauge
Remington 700 25-06, almost new rifle, closes fully on the same gauge.
I made .001" and .0015" shims out of SS shim stock and tested all 3 rifles again with each shim separately installed, with the .001" shim added the bolt is stiff to close, I could close it all the way but I did not. With the .0015" shim installed the bolt has a positive lockup well before closing. All three rifles are virtually identical.
I have been unable thus far to get an exact measurement on the diameter of the shoulder at the datum on the No-Go gauge. but just the fact that all three factory rifles are identical with this gauge leads me to believe that the gauge is not quite right.
What do you think? Right now I'm leaning toward returning it.
Guess I'll have to make a jig that I can install the gauge in to get an exact measurement from the datum line on the shoulder.
Last edited: