Where, in Canada, might I find a set of .22LR headspace gauges?
- Thread starter Kindly Old Coach
- Start date
I never found the need for them. I just have an assortment of different brand shells I try to make sure it will close on. 22LR ammo varies a lot in dimension and in general application isn't that critical on headspace. I have seen target grade guns that wouldn't close on certain brands of ammo.
- Location
- Northeastern Ontario
I ordered my go and no go gauges from Brownells. No issues getting them. I'm not aware of availability from a Canadian supplier although it's possible one or more of them could order it in for you.
Not a particularly hard set to make for your own purposes, given that all the features are essentially cylindrical, and about the only critical part is the thickness of the rim.
Make them of brass, for all that you will be using them. They will outlast whoever inherits them, as they are not expected to be able to withstand ill handling by the cheap help in a shop where the guys are not careful handling stuff!
Jonnyofalltrades
Regular
- Location
- North-central Saskatchewan
All nogo gauges are a waste of money!
lol ok, now do thread gages.
Excessive headspace with a .22 rim fire - you will have misfires and those that fire will have a very bulged case at the rear...
Normally a rim fire barrel is fitted so that the bolt contacts the rear face of barrel and the chamber rim is not cut deeper into the barrel. The headspace is built into the bolt face...
but for a gunsmith chambering and fitting barrels to minimum specifications a no go gauge is not required. It is all done with a go gauge.
It s true if the bolt will closes on a no go gauge you have excessive headspace but it still may be safe to use. If it closes on a field gauge it is no longer considered safe to use. The military use 3 gauges - go, no go, field.
Jonnyofalltrades
Regular
- Location
- North-central Saskatchewan
I guess I should say that as someone who fits metal parts together for a living, I personally don't usually drop money on a nogo gauge. It's just too easy to stick a shim on the back end of the go gauge, and Bob's your uncle.
Thread gauges are a different thing altogether. I have cut more threads than I care to remember, and I still remember the first time using a set of go nogo ring gauges. The realization that I didn't to have use the wires and a mike on that thread was thrilling!
- Location
- Western Manitoba
I got a Manson brand GO gauge a few years ago for .22 Long Rifle - in the baggie that I have it in is a 0.005" disc - probably my version of NOGO with that disc behind it. I recall making the disc by punching out a small circle from a Canadian Tire feeler gauge set. Baggie has written on it $69.30 - I presume that is what I paid for it, mailed to me from retailer in B.C. GO should be SAAMI Minimum - FIELD should be SAAMI Maximum - NOGO might be a barrel maker invention - I am not sure that is a SAAMI designation - not specified, that I can find, in SAAMI write-ups - how much longer is NOGO than GO - might be 0.004", but I'm not certain of that. Is usual that a gunsmith often wants to install close to GO - so often uses a "GO" gauge - sometimes uses shims - sometimes also uses a NOGO gauge, which is usually closer to GO than to FIELD - if installation accepts GO and does NOT accept NOGO, then you are probably close to SAAMI minimum length.
I also have steel GO gauge marked for 22 WMR - also Manson brand - I presume that is smidgeon different thickness than 22 Long Rifle. There are GO gauges here 7x57. A set for 303 British - GO, NOGO (?) and FIELD. Also a set for 308 Win (GO and NOGO). Also another set for 30-06 (GO, NOGO and FIELD). One set for belted magnum like 300 Win Mag (GO and NOGO) - all various makers - Forster, Clymer, JGS, home-made, etc. All bought previously used, on CGN, over the years. Except the rimfire ones - they were bought "new" from BigHorn Sales in Houston, B.C.
Sort of "snarky" comment - if you think you want headspace of 0.41" on a rimfire barrel, maybe look up what is "headspace" on a rimfire - go to SAAMI.org > Technical Information > SAAMI Standards - eventually find the chamber drawings (not a cartridge drawing) for item of interest - read what is SAAMI Min and Max for "headspace" and where they measure that from and to. You will probably meet or hear of some who will talk about using brass cartridge as headspace gauge - as if they are "same" - they are not.
I also have steel GO gauge marked for 22 WMR - also Manson brand - I presume that is smidgeon different thickness than 22 Long Rifle. There are GO gauges here 7x57. A set for 303 British - GO, NOGO (?) and FIELD. Also a set for 308 Win (GO and NOGO). Also another set for 30-06 (GO, NOGO and FIELD). One set for belted magnum like 300 Win Mag (GO and NOGO) - all various makers - Forster, Clymer, JGS, home-made, etc. All bought previously used, on CGN, over the years. Except the rimfire ones - they were bought "new" from BigHorn Sales in Houston, B.C.
Sort of "snarky" comment - if you think you want headspace of 0.41" on a rimfire barrel, maybe look up what is "headspace" on a rimfire - go to SAAMI.org > Technical Information > SAAMI Standards - eventually find the chamber drawings (not a cartridge drawing) for item of interest - read what is SAAMI Min and Max for "headspace" and where they measure that from and to. You will probably meet or hear of some who will talk about using brass cartridge as headspace gauge - as if they are "same" - they are not.
