Where to buy go/no go gauges.

Can not help with a Canadian supplier, but might help to know that there is no specific gauge set for 300 WM - all the cases based on the 375 H&H case use the identical GO/NOGO "gauges" which only verify the belt's recess sizing and depth. Might exist, but do not think there are "chamber gauges" that go up to a datum on the chamber shoulder, since I do not think SAAMI calls out such a dimension??

Edit - eating my words!! Just checked in SAAMI 2015 standard - there is so a datum called out for 300 Win Mag chamber. However, the "GO/NOGO" gauges I got (from Brownells ?) are very stubby - do not go up the chamber body length - just measure off the belt recess - they are labeled "300 Mag SAAMI Go .2200 8/12 JGS" and "300 Mag. SAAMI NoGo .2240 4/11 JGS"
 
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Potashminer said:
Can not help with a Canadian supplier, but might help to know that there is no specific gauge set for 300 WM - all the cases based on the 375 H&H case use the identical GO/NOGO "gauges" which only verify the belt's recess sizing and depth. Might exist, but do not think there are "chamber gauges" that go up to a datum on the chamber shoulder, since I do not think SAAMI calls out such a dimension??

Edit - eating my words!! Just checked in SAAMI 2015 standard - there is so a datum called out for 300 Win Mag chamber. However, the "GO/NOGO" gauges I got (from Brownells ?) are very stubby - do not go up the chamber body length - just measure off the belt recess - they are labeled "300 Mag SAAMI Go .2200 8/12 JGS" and "300 Mag. SAAMI NoGo .2240 4/11 JGS"
Click to expand...

So really the arse end of a case would work based on your original set.
 
Has apparently been done. (using a random brass cartridge, or selection of them, to fit a barrel, that is) Note the sizing, though - Go is .2200" and NoGo is .2240" - those are to 4 decimal places - so dimensions are to 10-thousandth of inch - definitely need good micrometer (not calliper) to be able to measure that fine. I find it very challenging to measure something three times and get three identical readings to .0001" with a Mitutoyo micrometer. So, .0040" difference between this Go and NoGo - roughly the thickness of piece of computer printer paper... If bolt closes with one finger tip pressure on Go, and does not close with one finger tip pressure on NoGo, you have a SAAMI standard chamber, I believe. .0040" tolerance. Easy enough to "force" a bolt closed on a gauge with pressure - probably de-forming (ruining) the gauge and chamber by doing that - gauging is a very light finger-tip pressure exercise to try to "feel" if gauge contacts the chamber metal, so usually want a completely stripped bolt body and bare barrelled action - nothing else to interfere in that attempt to "feel" contact or not..
 
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Potashminer said:
Has apparently been done. (using a random brass cartridge, or selection of them, to fit a barrel, that is) Note the sizing, though - Go is .2200" and NoGo is .2240" - those are to 4 decimal places - so dimensions are to 10-thousandth of inch - definitely need good micrometer (not calliper) to be able to measure that fine. I find it very challenging to measure something three times and get three identical readings to .0001" with a Mitutoyo micrometer. So, .0040" difference between this Go and NoGo - roughly the thickness of piece of computer printer paper... If bolt closes with one finger tip pressure on Go, and does not close with one finger tip pressure on NoGo, you have a SAAMI standard chamber, I believe. .0040" tolerance. Easy enough to "force" a bolt closed on a gauge with pressure - probably de-forming (ruining) the gauge and chamber by doing that - gauging is a very light finger-tip pressure exercise to try to "feel" if gauge contacts the chamber metal, so usually want a completely stripped bolt body and bare barrelled action - nothing else to interfere in that attempt to "feel" contact or not..
Click to expand...

A fired case with scotch tape on the base maybe.
 
Can be done, but no assurance it would meet SAAMI criteria - all commercial SAAMI compliant ammo made by anyone, will chamber and safely fire in any SAAMI compliant chamber - it will fit, and it will fire. "Home brewed" solutions may or may not work - some cartridges might not go in; some might not fire, depending if you ended up too long or too short.

For one of a kind - I had a serviceable Chilean 1895 receiver - barrel was pooched, so gone. Then found a small ring Peruvian Mauser barrel in 7.65 Mauser. I already load for a 1909 Argentine in that cartridge. No reamers, no gauges. Set up my press, ran 7.65 Mauser previously fired brass over my 338 Win Mag expander, and then fully resized 10 7.65 Mauser previously fired cases with die hard to shell holder. Then backed off the die what I could best guess at 10 degrees - should have resulted in about .002" longer cases (sort of - did not do detail beyond scribbling on note pad) Sized 5 more to be "too long" over full length sizing. Paraguay barrel has longer barrel tenon thread than does the Chilean, and Paraguay chamber cut much too deep (no wonder did not hear of Paraguay winning many wars!!!) So, trimmed the rear of that barrel on lathe to get "correct" amount of clearance for mauser extractor with "full length sized" cases tight to chamber shoulder. Then had to turn a "breeching washer" to act as spacer between the Paraguay barrel shoulder and the front of the Chilean receiver. All 10 of my "full length sized" brass chamber fine, so I am satisfied the chamber to bolt face dimension is "long enough". Not one of the 5 x "too long" will allow the bolt to close, so I am satisfied the chamber to bolt face dimension is not "too long". So my bolt face to chamber shoulder distance is some where between full length sized out of this die of mine, and plus about .002". No clue at all if that matches to SAAMI - it is an old beater, and I do not know many people willingly using the 7.65 Mauser cartridge anyway - will be a "one of" in my opinion, and I do not know or care whether it will chamber "factory" 7.65 Mauser cartridges - never seen any for sale and no intention to buy any.
 
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Belted case - is like a rimmed case - dependable firing based on that belt tight up against the recess in chamber - cartridge will fire. Handloader / target shooter, etc. want better, so likely will want to ignore that belt and set headspace off the shoulder of the chamber. As mentioned above, I do not know if there is such a go and nogo gauge set to buy for that?? Standard go and nogo for 300 WM will be gauging to the belt recess.
 
For most of us, the bolt face to chamber shoulder is a given - typically not attempting to alter that. So, using the false shoulder idea described above, allows the brass to be nearly perfectly fitted to whatever that chamber / bolt dimension is. At that point, no longer relying on SAAMI for dimensions - making the brass fit closely to chamber. So, nothing to check with Go and NoGo gauges - those are only used to create a SAAMI compliant chamber. There is/was a third gauge - the FIELD gauge - that is used to "check" whether the chamber is no longer "safe" for standard cartridges. But even then, false shoulder technique can be used to create perfectly serviceable ammo, so long as whatever issue caused that chamber to lengthen has been dealt with (bolt lug recess set back comes to mind, excessive lapping of the rear face of bolt lugs, and so on...)

If you did lap the bolt lugs, and if the bolt will now close on a SAAMI NoGo gauge, your chamber is probably "too long" for a SAAMI new chamber. Might still be under the FIELD length, though, which is that absolute maximum that SAAMI allows. From the 2015 SAAMI drawings, that Maximum is 0.227" so that is the bolt face to front edge of the belt recess in the chamber. If your chamber is longer than that, you have made a "wildcat" - a non-standard thing.

Knowing a "hack" might help. Get a cheap set of flat bladed feeler gauges. Use tin snips or sharp scissors and cut circles that fit into your bolt face. So, place a .003" thick circle in the bolt face (very thin, small dab of grease will hold it there) - then try to close the stripped bolt on a SAAMI NoGo gauge - will be pretty close to having a "FIELD" gauge...
 
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45C said:
May as well order from Nanchez or Ebay.
Probably be cheaper and get them just as quick.
Click to expand...

Natchez is proud to accept international customers and we welcome the opportunity to fulfill your shooting sports needs. International orders can be fulfilled regardless of the country of origination for the order, provided that the final shipping destination for the order is within the United States.

Doors just keep closing. ;)
 
Kelly Timoffee said:
Well, I've been on the phone pretty much all morning looking.

All I can say is good damn luck to anybody looking.

What do the gunsmiths do?
Click to expand...

Well, unless damaged, gauges don't really wear out - so common ones, like for belted magnums, probably picked up when first getting set up? I believe a lot of the ones I ended up with were added to my semi-regular orders to Brownells... I hasten to add - I am not a gunsmith - just like messing with my own stuff, so when I retired from working, I bought a lot of the tooling, just to do that "messing" ...
 
These will ship to canada
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45C said:
These will ship to canada
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eBay
Sporting Goods
Hunting Equipment
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Last item available
FORSTER HEADSPACE NO GO GAGE RIMMED & BELTED FOR 300 MAG & BELT MAG MFG#BG300MN
Condition: New
$32.99+ $17.37 Shipping
Est. Delivery Tue, Oct 20 - Fri, Oct 23
More than 79% sold
Longtime member
Buy It NowAdd to cart
Related items to consider
FORSTER HEADSPACE FIELD, GO & NO GO GAGE RIMMED/BELTED FOR 30 30 WIN #BG3030FGN
item 2 FORSTER HEADSPACE FIELD, GO & NO GO GAGE RIMMED/BELTED FOR 30 30 WIN #BG3030FGN 1 -
FORSTER HEADSPACE FIELD, GO & NO GO GAGE RIMMED/BELTED FOR 30 30 WIN #BG3030FGN
$98.97
+$19.48 shipping
About this item
Condition
New
Quantity
4 sold
1 available
Brand
Forster Products
Country/Region of Manufacture
United States
Type
HEADSPACE GAGE
MPN
BG300MN
Caliber
300 MAG
See all
Item description
"If a rifle closes on a GO gage, the rifle chamber will accept any ammunition that is made within SAAMI (industry standard) specifications. 300 MAGNUM HEADSPACE NO GO GAGE #BG0300N."
See allItem description
Shipping, Returns & Payments
Ships from
Sallisaw, Oklahoma
Delivery to J4H0A1
Est. Tue, Oct 20 - Fri, Oct 23
From Sallisaw, Oklahoma
Returns
No returns, but backed by eBay Money back guarantee
Payments
Import charges
Includes international tracking.
$8.43 import charges confirmed at checkout.
Learn more.
Shop with confidence
eBay Money Back Guarantee
Get the item you ordered or your money back

About this seller
camaro75Feedback Score (6255)
99.9% positive feedback
People who viewed this item also viewed
FORSTER HEADSPACE FIELD GAGE RIMMED & BELTED FOR 300 MAG & BELT MAG MFG#BG300MF
FORSTER HEADSPACE FIELD GAGE RIMMED & BELTED FOR 300 MAG & BELT MAG MFG#BG300MF
$32.99
Click to expand...

I will check them out, thank you sir.
 
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