PTG Go-Gauge specs??? 300 WSM

[Clinton]

I just wasted a couple hours trying to rebarrel a 300 WSM with a PTG Go-Gauge for 300 WSM. My bolt face is is .540 but the PTG go-gauge rim measures .545. I removed the extractor and the ejector when it first didn't seem to fit, and then push fed the go-gauge into the chamber to head space the barrel. After having a heck of a time trying to get a consistent feel for go vs no-go I looked closer and noticed the problem. Anyone else have this issue with PTG go-gauges being proud vs bolt face diameter?

Any advice? Maybe some fine sandpaper to take 5/1000 off the side of the rim of the go-gauge???

 

[butchlambert]

My PT&G measures .535"

 

[Clinton]

My PT&G measures .535"

Thanks, not sure why mine is proud

 

[Clinton]

So it seems to have worked...I put the go-gauge in the chuck of my drill press and used 180 and then 320 grit sand paper to take off a few thousands from the edge of the rim. It now measures .538 -- 7/1000ths less than before and it now fits the magnum bolt face.

 

[LVLAaron]

I'd verify that the headspace is what it should be.

 

[Will Henry]

Sandpaper! Hell, I'd have just taken it to the bench grinder and slimmed it down in a hurry! This is an advanced technique, mind you. WH

 

[boltfluter]

Thanks, not sure why mine is proud

That's an easy answer. Because it is made by PTG. Some things never change.

 

[shortgrass]

I'd verify that the headspace is what it should be.

Anything short of digital gaging or an optical comparator might just get ya' 'close'. I like the bench grinder rim diameter 'fix'. That's one dimension that's not critical, only needs to loosely fit the bolt face.

 

[LVLAaron]

Anything short of digital gaging or an optical comparator might just get ya' 'close'. I like the bench grinder rim diameter 'fix'. That's one dimension that's not critical, only needs to loosely fit the bolt face.

I'm sayin, it's PTG. They already screwed up one critical dimension, the other one might be screwed up too

 

[SKWERLZ]

That's an easy answer. Because it is made by PTG. Some things never change.

Lol^^^^

 

[DaveTooley]

Sandpaper! Hell, I'd have just taken it to the bench grinder and slimmed it down in a hurry! This is an advanced technique, mind you. WH

I'd use my Scotchbrite wheel so it was shiny.

 

[Will Henry]

I'd use my Scotchbrite wheel so it was shiny.

Good call. WH

 

[butchlambert]

I'd use my Scotchbrite wheel so it was shiny.

If it doesn't go-Chrome it!