Rechambering a barrel

Snav · Dec 2, 2017

I recently was sorting some items and found a No-Go gauge from a rifle I had re-chambered back in 2002. Would a gunsmith ream a chamber just using a no-go gauge or was he just sending it along for maintenance. I have no idea whether the reamer he used was a rental but PTG said no-go was Midway part no.

GuitarmanNick · Dec 2, 2017

He's probably been looking for that gauge ever since he sent your barrel back.

John from MD · Dec 9, 2017

Probably right.

Doco Overboard · Dec 9, 2017

Maybe it was close and he was worried the lugs would set back and just thought he would save you a trip.

K-43 · Dec 12, 2017

Either a mistake or he didn't plan to use it again. Either way you probably paid for it anyway.
What's the SAMMI Spec for a "NO GO" Gauge? Oh! There isn't one? Really? Way!. It's whatever the gauge maker decides it should be.

Snav · Jan 5, 2018

I think, since the rechambering was from 8mm-Mauser to 8mm-06AI he had plenty of no-go guages. In retrospect you couldn't rechamber with a no-go only and I'm not even sure if a separately marked gauge from 30-06 was needed.

I originally wanted this for safari but ended up using 35 Whelen.

Doco Overboard · Jan 5, 2018

Was the gauge that was left behind a 30.06 no go? If it was, will a stripped bolt close on it? Improving cartridge cases may not increase HS unless it was over reamed. If it was, your fire-formed cases are now your new gauge.

Snav · Jan 8, 2018

No, It's marked 8mm-06 Ack No-Go then PTG and part #. PTG says it is a Midway #. I will take some measurements of the case.

Biggfoot44 · Jan 9, 2018

Ah Ha !

If you'd gone with std 8mm-06 , he could have used a stg .30-06 No Go . For 8mm Ackley he'll probably never have need for it again , and I'm sure he charged you for it directly , or indirectly built into the fee for rechambering.

**************

But now that you've teased us , spill the beans on your 8mm Ackley . Load development, velocities , accuracy, etc .

Doco Overboard · Jan 9, 2018

How's it shoot? Should have some pretty good thump. It would be interesting to see how the no-go 30-06 gauge reacts with the chamber. Some improved chambers will use the same no go gauge as the parent cartridge. Some go gauges for improved chambers are a little shorter to prevent the case from being crushed against the shoulder when the bolt is closed. So fire forming can occur at the junction of neck and chamber until the case is "blown out". There will only be a little contact there until the case is formed.

Snav · Jan 9, 2018

Shoots very well, and ballistically superior to the .35 Whelen I had to take to Africa (they don't accept mis-stamped ammo). Built on a Yugo M48 mauser.

Doco Overboard · Jan 10, 2018

Snav said:
Shoots very well, and ballistically superior to the .35 Whelen I had to take to Africa (they don't accept mis-stamped ammo). Built on a Yugo M48 mauser.

I like stuff like that. Some of the first rifles I built were on the shorter Yugo action. I still have two of them. I went 30-06 with the first, no problems with mag length, drives tacks, too easy to shoot but on the heavy side because of medium wgt. sporter barrel.
The other still in 8mm, thought about 8mm 06 but chrome lined bore and there was nothing wrong with it to begin with.
Action a little sticky from heat treat I guess but a good looking deer rifle. I used to just shoot the hell out of it when ammo was cheap and the damn thing looks the same as it did minus the sport job. I had another one too years ago and sold it off just to clear some stuff out of the way.

Rechambering a barrel

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