Just to follow up,
I installed the .400 Hornady comparator instead of the .375 to get more specific readings.
I have a Clymer No-Go gauge that is supposedly set to 1.547. It measures to 1.5435 with my caliper and Hornady tool. The bolt will not close on the No Go gauge although I can get the bolt to slide forward pretty far. Just can't get that bolt down (as it's supposed to be)
A piece of brass set to 1.5420 chambers and it seems to chamber easily.
I then measure my brass that is very tight in my chamber with 2 pieces of tape on it and it measures: 1.5440
So my brass with tape that gets tight in the chamber is about .0005 longer than the No Go gauge.
The No Go gauge (1.5435)will not allow the bolt to close, but the brass witb tape (1.5440) will with force.
Dumb Question: I am assuming the bolt can close on the brass with tape and cannot close on the No Go gauge because the No Go gauge is made of steel and the brass is made of brass with 2 pieces of tape on the base which is much more pliable than steel.
So does that mean my chamber is basically toward the end of my No Go gauge and I should expect to bump the brass near 1.5420?
Figuring out that exact length seems a bit difficult without a tool to be precise
One thing to add. I measured my Go gauge and got: 1.5380
Yet new Lapua and Hornady brass is 1.5345 which is lower than the Go Gauge! <-- The size of new brass is what confused me the most about this. I was thinking my chamber was off because the brass seemed to have so much to grow
To summarize relative sizes with my Hornady .400 comparator
New brass = 1.5345
Go Gauge = 1.5380
Current Brass = 1.5420
No Go gauge = 1.5435
Brass with tape on the end and tight in chamber = 1.5440
I installed the .400 Hornady comparator instead of the .375 to get more specific readings.
I have a Clymer No-Go gauge that is supposedly set to 1.547. It measures to 1.5435 with my caliper and Hornady tool. The bolt will not close on the No Go gauge although I can get the bolt to slide forward pretty far. Just can't get that bolt down (as it's supposed to be)
A piece of brass set to 1.5420 chambers and it seems to chamber easily.
I then measure my brass that is very tight in my chamber with 2 pieces of tape on it and it measures: 1.5440
So my brass with tape that gets tight in the chamber is about .0005 longer than the No Go gauge.
The No Go gauge (1.5435)will not allow the bolt to close, but the brass witb tape (1.5440) will with force.
Dumb Question: I am assuming the bolt can close on the brass with tape and cannot close on the No Go gauge because the No Go gauge is made of steel and the brass is made of brass with 2 pieces of tape on the base which is much more pliable than steel.
So does that mean my chamber is basically toward the end of my No Go gauge and I should expect to bump the brass near 1.5420?
Figuring out that exact length seems a bit difficult without a tool to be precise
One thing to add. I measured my Go gauge and got: 1.5380
Yet new Lapua and Hornady brass is 1.5345 which is lower than the Go Gauge! <-- The size of new brass is what confused me the most about this. I was thinking my chamber was off because the brass seemed to have so much to grow
To summarize relative sizes with my Hornady .400 comparator
New brass = 1.5345
Go Gauge = 1.5380
Current Brass = 1.5420
No Go gauge = 1.5435
Brass with tape on the end and tight in chamber = 1.5440
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