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The set tru or adjust tru chucks are super useful in the machine world and are excellent choices for rifle barrel work. You can dial in a rifle bore to under .0001 easy with good 4 groove cut rifle barrels and a set tru chuck. I have two 3 jaw and one 6 jaw set tru chucks. I would never go back...

Jackie you are right. This just adds another problem that aint there to start with.

Whats so Funny???

Having a straight barrel does not mean it will shoot with benchrest Accuracy! I have seen straighter ones not group well and crooked ones Hammer! Never know what you have til you test it on target. Ive seen barrels that people was sending back to the manufacturer and they turn out to be the best...

This Remington 700 thread tenon was cut with Arthur Warner HSS insert threading tool on a 1963 South Bend Heavy 10 lathe at about 140 RPM

The Acer 1340 is what i used in school. Very nice gearhead lathe. I still prefer my 1963 South Bend Heavy 10 for what i do. I have a Enco 12x36 that mainly just gets used for polishing barrels since the South Bend came along.

Same as my beloved South Bend Heavy 10 i do all my chamber and thread work on. These little Heavy 10s are great machines for chambering barrels thru the headstock. My all time favorite lathe for riflesmith work!!

I have chambered barrels now using the long headstock method using bushings in the spindle bore on two different lathes. One 15 Leblond regal and the other a 15 inch Clausing Colchester with great results. Ive also used a steady rest and ive also used Gordy method. To each his own but i like...

Jerry i have used your reamer bushing trick many times on 5 Groove barrels to help me set them up. It works so well that if i put a indicator back inside the bore its within .0002 most times!

Thats my take on this as well. I have used PTG range rods and zero on it and then run indicator inside the barrel to find .001-.002 of runout. I feel like using the indicator inside the bore is the best and most accurate way.

I have been having good results indicating rifle barrels in my 1963 South Bend Heavy 10 lathe using Buck Ajust-Tru chucks. I use 312B-15 Interapid .0005 indicator with 2.75 stem. I also use the Mitutoyo 513-504 .0001 round body as per Jackie and Butch. I had a machinist tell me the other day...

Got to love them Old American made Heavy 10s!!!

Thats Awesome Jerry

If you use Gordys method you want worry about indicating the muzzle end when threading and chambering.

20 Vartarg is a Awesome little cartridge! You want have any problems setting up your 20 VT. If your Reamer neck is .232 or bigger you want have to turn necks on most brass cases. Loaded rounds are usually .228-.229 for me. Also once you run a 221 fireball case in the 20 Vartarg die it is almost...

Thanks Mike Bryant and Rubicon Precision. I really enjoy this little lathe more than any I have ever used to fit barrels.

Jerry I would have to cut the wall of the shop out and do a major add on to fit this machine in my shop. Don't think I will ever need a barrel that big!

Thanks Mike. It works well for me threading and chambering my barrels. I still have my Enco 12x36 belt driven lathe in my shop I use from time to time, but the South Bend is the Prize machine!

Butch it's a 25x120 lathe. That is a 9.5 inch shaft 10 ft long my machinist friend is making a shaft for a coal mine hoist