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  1. No, the TBAS is particularly designed to take out...

    No, the TBAS is particularly designed to take out that non-concentricity as well as lineal misalignment. If the bore were concentric to the outside and straight, a regular chuck would do (well,...
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    There's a lot of good info on indicators here:...

    There's a lot of good info on indicators here: http://www.longislandindicator.com/. I was surprised to find out that they don't think too highly of (newer) Mitutoyo or B&S. Their top pick is...
  3. I haven't tried it, but Steve Acker once...

    I haven't tried it, but Steve Acker once demonstrated putting a bearing surface on a barrel by installing a sleeve attached with bondo that he then trued between centers before using it as a bearing...
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    Yes, and that's how I perceive this thread. I...

    Yes, and that's how I perceive this thread. I very much value considered input from others. Thanks for lots of food for thought Butch!

    GsT
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    Thanks for the clarification Butch. Yes, you...

    Thanks for the clarification Butch. Yes, you have two points dialed in. In theory the advantage of the Gordy method is that you're dialing in the first bit (let's say an inch) of the bore, rather...
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    That's a great question Butch, and I've reversed...

    That's a great question Butch, and I've reversed my thoughts on it a couple of times as I sit here pondering it. My answer above, was really addressing the Gordy method vs chambering between centers...
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    That's a good point Butch, and one I omitted. I...

    That's a good point Butch, and one I omitted. I check my setup frequently as I go along. I've seldom had anything move and the few times I've had a change in readings I've suspected machining...
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    Here's how I do it.

    An excellent machinist might cut things closer than I do, but I oops'd the first time, so I take a conservative approach. Get your reamer drawing and figure out what diameter and depth you can drill...
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    Shotgun and pistol powders are the same thing. ...

    Shotgun and pistol powders are the same thing. Most of those powders are, or can be, used for both.

    Parshal - a rotary tumbler with stainless medium will clean the COW right out. And thanks for...
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    At first I thought that was a .458 Socom, but the...

    At first I thought that was a .458 Socom, but the rim wasn't rebated, then I recall you talking about using .338LM brass as a parent for something like this - is that the case? What sort of powder...
  11. I haven't done it...

    ...but I think the first thing is to establish if there's really a problem. There're lots of round actions in competition and critical applications and adding a flat bottom would be an easy thing to...
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    It's hard enough, even if you're already interested

    I've been interested in BR for years. But I've never been in a good position to try it out (until recently). For starters, there just aren't a lot of clubs running matches. I formerly belonged to...
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    While utterly lacking the fine-art value of some...

    While utterly lacking the fine-art value of some of the previous examples, I think the Steyr Scout and some of Cooper's pre-Steyr prototypes fit the bill mighty nicely.

    GsT
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    Do you profile your own barrels? If so, how does...

    Do you profile your own barrels? If so, how does your technique differ when the shaft is scaled down that much?

    Thanks,
    GsT
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    That toolpost needs something in the picture so...

    That toolpost needs something in the picture so we A/B/C guys can see how big an EA is.

    GsT
  16. Thread: tpi to M

    by GeneT
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    We're working on it, and will be completely...

    We're working on it, and will be completely metric within six years. At least that's what I was told some 40 years ago...

    GsT
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    Thanks for the response Al! GsT

    Thanks for the response Al!

    GsT
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    Hi Al, Thanks for posting about this - that's...

    Hi Al,

    Thanks for posting about this - that's more to chew on. I am curious though, what makes the tools available today (e.g. a standard chucking reamer) inadequate for this job? Is it just a...
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    I think this is it.

    https://www.centralmaine.com/2019/12/08/farmingdale-mans-elite-shooting-earns-him-his-own-signature-rifle/

    GsT
  20. Thread: friggin' awesome

    by GeneT
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    Microsoft will cease supporting Windows 7 in...

    Microsoft will cease supporting Windows 7 in about a month: https://www.microsoft.com/en-us/microsoft-365/windows/end-of-windows-7-support. That means security patches and the like will no longer be...
  21. Thread: tpi to M

    by GeneT
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    You need an adapter. I don't believe there are...

    You need an adapter. I don't believe there are any standard threads that are the completely the same in SAE and metric.

    GsT
  22. Gotcha. Thanks for the response. GsT

    Gotcha. Thanks for the response.

    GsT
  23. Can you elaborate Butch? Do you mean the...

    Can you elaborate Butch? Do you mean the clamping pressure moving the bore, or something else?

    GsT
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    Yes. The Sinclair mandrels will not work. (You...

    Yes. The Sinclair mandrels will not work. (You *could* use one, but you'd be giving up the fine adjustment that makes a pumpkin a pumpkin).

    GsT
  25. Thread: Barrel life

    by GeneT
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    Thanks for the link! You've probably cost me...

    Thanks for the link! You've probably cost me $95... I understand the fundamentals of barrel erosion, but my real question was what mechanism made such an abrupt change, rather than a gradual loss...
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