Interesting acquisition

I bought these on Friday from an engineering supplier, purely from an interest point of view. They came from SAF Lithgow, and while I havn't measured them yet, I'll bet they're for 7.62 or .303.
I wonder if anyone could put them to use??

They need to be mounted under glass in a coffee table. They may not be rare, or even desirable to most.. but what a conversation piece. Keep the guests guessing for hours.

Good pick-up, mate!

Nice, pity my big lathe is not longer, often thought about using those. Maybe just to restore old barrels to the next size up.

Just had my prostate done, actually, or I'd ask to borrow them.

I'd bet not 1 in 10,000 people would have any idea as to what they are. The glass top coffee table is a great idea and would be a great conversation piece. Great find.

I've thought how handy and how much money you could make with a set up like that...I've seen the machines though and they're not small.

They ain't cheap either!

G'Day,
Can they be drawn through the bore using the helix ground into the broach to guide them or do they need to be driven at the correct pitch per revolution for them to work.

Rastis.

The helix forms its own 'thread' that is the rifling. A friend of mine made a puller using hydraulic rams, taken from the tail lift of a lorry. But if they're not 'lifting' equally, you're in trouble

This may help and you can FF to the broaching ,

Barrel Making at Pedersoli factory - YouTube



For the traditionalists out there, this is the old way,

Sine Bar Rifling Machine not Button RIfling Rifler - YouTube

Had a few of those out of LB many moons ago. Unfortunately I didn't really grasp their significance at the time and let them go for very little, but they went to a good home, or should I say, shed! ;)

If that's the complete set, perhaps you can make up some more H barrels for us?