Hey, Gene, I got an idee,

[Jay Idaho]

Open up a receiver thread to 1.125 x 16 TPI or even 1.150 major dia. I've taken them (700s) to 1.100 without a problem.
Next, make a set of bushings with a shoulder, like a flanged drill bushing. Outside thread of 1.XXX x 16 (to match receiver), inside thread of 1.000 x 16 or whatever pitch you like. Flange could be 1/8 to 1/4 thick, not important, same o.d. as receiver.
Make a set of 4 or 8 or 16 bushings on a CNC and index the internal thread to start at different points. Just swap bushings and screw the barrel back in, barrel is indexed without any measuring required. Headspace stays the same.
There is probably something wrong with this idea but I thought it sounded good when I first thought of it.

I think that BAT makes and action with an insert up front. There is a reason they make it but I don't remember what it is.

Jay, Idaho

 

[Vibe]

I looked at something like that when I worked on a differential thread bushing design. But I approached it from a front entry bushing wrench aspect. The "wrench" became part of the barrel/action assembly.

 

[Gene Beggs]

Open up a receiver thread to 1.125 x 16 TPI or even 1.150 major dia. I've taken them (700s) to 1.100 without a problem.
Next, make a set of bushings with a shoulder, like a flanged drill bushing. Outside thread of 1.XXX x 16 (to match receiver), inside thread of 1.000 x 16 or whatever pitch you like. Flange could be 1/8 to 1/4 thick, not important, same o.d. as receiver.
Make a set of 4 or 8 or 16 bushings on a CNC and index the internal thread to start at different points. Just swap bushings and screw the barrel back in, barrel is indexed without any measuring required. Headspace stays the same.
There is probably something wrong with this idea but I thought it sounded good when I first thought of it.

I think that BAT makes and action with an insert up front. There is a reason they make it but I don't remember what it is.

Jay, Idaho

Jay, this is some good thinking, I'll keep it in mind.

Gene Beggs

 

[Pete Wass]

Another thought - -

A friend was here for dinner this evening; a fellow shooter and we were discussing this issue. He said" someone has to make bigger actions. Right away I said, "Someone allready does". I was thinking about my Hall B. He then asked what size tennon it had. I went and got the PPC barrel that was taken off when the 30 BR barrel was fitted. The tennon measured smaller them 1". So, there is plenty of room with a Hall B BUT - - - With a 1" tennon, why isn't tight cases an issue?

I also got to thinking; I always full length resize my cases as a matter of course anyway. HBR rifle actions must be no larger then 1.350 so when we do the math - - - -. I have used a Rem. 700 in the past with HBR cases and never once was concerned about shooting loads that were well beyond anything one finds in the reloading manuals.

Personally I would rather have tackdrivers that wrecked cases than so-so shooting rifles. Just a thought.

 

[spencer313]

Make a set of 4 or 8 or 16 bushings on a CNC and index the internal thread to start at different points. Just swap bushings and screw the barrel back in, barrel is indexed without any measuring required. Headspace stays the same.

Jay, Idaho

I have been recently experimenting with thread milling on my CNC, and this is easy-peasy. Great idea.

 

[stiller]

we have a few pythons in stock.

1.1875 - 18tpi threads. that big enough for ya. Like I said in a prior post though, the shoulder must be large enough or other problems crop up.