.308 = 762x39 x51?

[Centurian22]

Jim, I stand corrected. That's why I stated 'IIR'. I also should have stated that it was second hand info that I had no confirmation of. Glad I was able to learn from this.

 

[morcey2]

I have a 1909 argie that was shamelessly reamed out to chamber 30-06, but the bore slugs at 0.312. It shoots pretty well with 180 grain 30-06, but not too well w/ 150. I'm seriously thinking about getting one of the mcace adapters to use it as a 7.62x39 plinker. There's a long jump to the rifling, but I still think it would be somewhat more accurate with a tighter fitting bullet.

Matt

 

[7.62 Nato]

But it was never known as that except in Europe.

In the USA, a 30-06 has always been called a 30-06 by the military, and everybody.

rc

Or .30 Government

Correction. That was the .30-40 Krag.

 

[Jim Watson]

The .30-40 Krag was variously listed as .30 Army and .30 Gov't.
The .30-06 was usually shown as .30 Gov't '06.

It is American practice to make bullets and barrel groove diameter match.
But there is a European school of thought that says there ought to be someplace for the bullet metal displaced by the lands to go. This leads to deep grooves and what looks like undersize bullets to us.

 

[ThePenguinKnight]

I have a 1909 argie that was shamelessly reamed out to chamber 30-06, but the bore slugs at 0.312. It shoots pretty well with 180 grain 30-06, but not too well w/ 150. I'm seriously thinking about getting one of the mcace adapters to use it as a 7.62x39 plinker. There's a long jump to the rifling, but I still think it would be somewhat more accurate with a tighter fitting bullet.

Matt

You could always load .312 bullets into some .30-06 brass. No chamber insert needed, and most likely you can get some good accuracy from that old gal. Might need to order a .312 resizing mandrel-- for my Mosin I use a .308 mandrel and it works quite well with .312 bullets, but YMMV and experimentation would be needed for that one.

A quick search around the internet says the chamber inserts are interesting, but few people have dared to risk their rifle investment by actually firing through one. Plenty of people saying why it wouldn't work, though...

As a side note, Matt, I found your posts over on another forum and was wondering how that had worked out for you. Let me know whatever you end up doing

 

[morcey2]

You could always load .312 bullets into some .30-06 brass. No chamber insert needed, and most likely you can get some good accuracy from that old gal. Might need to order a .312 resizing mandrel-- for my Mosin I use a .308 mandrel and it works quite well with .312 bullets, but YMMV and experimentation would be needed for that one.

A quick search around the internet says the chamber inserts are interesting, but few people have dared to risk their rifle investment by actually firing through one. Plenty of people saying why it wouldn't work, though...

As a side note, Matt, I found your posts over on another forum and was wondering how that had worked out for you. Let me know whatever you end up doing

There are two reasons that I'm not sure I want to go the .31-06 route (30-06 w/ a .312 bullet).

1. chamber dimensions. The neck may be too large for the chamber since the reamer probably wasn't designed for the extra 0.004" diameter. Not a huge concern, but enough.

2. Too many 30-06's already. I have several 30-06s right now and I'm not ready to start segregating out the 31-06 from the 30-06.

I'm not sure which posts you're referring to on another forum, but I'll take a guess. I have an original 1909 rifle barrel in 7.65x53 from Numrich that I may have put on this receiver. Bore isn't great, but it's pretty good. Several places have 1909 stock sets for a reasonable amount, so restoring it to its semi-original condition is an option.

I'm still debating getting an adapter prior to that and seeing how it does that way. I've been ready to order the adapter several times, but things keep getting in the way (kids like to eat. stuff like that.) I might do it soon.

The 30-06 - 308/7.62x51 inserts seem to be more common, but have issues with 'unintentional removal' during use. The 7.62x39 version should have significantly more surface area for the loc tite to bond.

Anyway, just rambling now.

Matt