Timing a receiver to the barrel question

[DaveTooley]

It's a nice project for the guy just getting started and makes life much easier for us old dogs. It doesn't have to be a direct tenth reading thimble like I used. A standard thimble like the one below works just as well.

Brown & Sharpe 599-288-34 Convertible Thimble Micrometer 1 inch | eBay

Find many great new & used options and get the best deals for Brown & Sharpe 599-288-34 Convertible Thimble Micrometer 1 inch at the best online prices at eBay! Free shipping for many products!

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[DaveTooley]

here's a deal

Mitutoyo #152-391 Micrometer Head Only 0-1" .0001" for sale online | eBay

Find many great new & used options and get the best deals for Mitutoyo #152-391 Micrometer Head Only 0-1" .0001" at the best online prices at eBay! Free shipping for many products!

www.ebay.com

 

[dnellans]

here's a deal

Mitutoyo #152-391 Micrometer Head Only 0-1" .0001" for sale online | eBay

Find many great new & used options and get the best deals for Mitutoyo #152-391 Micrometer Head Only 0-1" .0001" at the best online prices at eBay! Free shipping for many products!

www.ebay.com

Which one of you bums bought my deal before I could? =)

 

[DaveTooley]

There's a lot #17 same price

 

[dnellans]

Looks like I have a new project - thanks Dave!

 

[tobnpr]

The way I set barrels up, and chamber, the muzzle end, throat, and chamber all run in line with each other. Any thing in between those points is ignored since you can’t do anything about it anyway.

I don't follow this- unless you're counting the throat and chamber as a single point.
It's only possible to connect any "straight line" through two points, and only two points.
Three can never work, unless through pure happenstance, the third point just happens to fall in line with the two selected.

Now, I can pick a spot at the throat, and just inside the muzzle- and align those two to the spindle axis, but anything that happens in between those two points, as well as what the bore is doing behind the throat- has to be irrelevant.

I don't index, but if I did, I would do what's immediately above- throat, and muzzle. The bore behind the throat is going to get reamed out and made concentric anyway so it doesn't matter.

 

[WSnyder]

I don't follow this- unless you're counting the throat and chamber as a single point.
It's only possible to connect any "straight line" through two points, and only two points.
Three can never work, unless through pure happenstance, the third point just happens to fall in line with the two selected.

Now, I can pick a spot at the throat, and just inside the muzzle- and align those two to the spindle axis, but anything that happens in between those two points, as well as what the bore is doing behind the throat- has to be irrelevant.

I don't index, but if I did, I would do what's immediately above- throat, and muzzle. The bore behind the throat is going to get reamed out and made concentric anyway so it doesn't matter.

The way I set barrels up, and chamber, the muzzle end, throat, and chamber all run in line with each other. Any thing in between those points is ignored since you can’t do anything about it anyway.

What I read Jackie to be saying is that he picks the throat and muzzle to indicate and if you put a good chamber in it's going to line up with the throat and muzzle. He may not say that exactly but after reading his posts over the years I know that's how he chambers a barrel. You pretty much state the same in your last paragraph.

I don't index, but if I did, I would do what's immediately above- throat, and muzzle. The bore behind the throat is going to get reamed out and made concentric anyway so it doesn't matter.

 

[tobnpr]

^^^
Gotcha, makes sense.