Indicating 5R Barrel

[Excellence In Mediocrity]

Does anyone have any best practices for indicating barrels for breech/muzzle work if they are a 5R? I’ve just been resorting to rods instead of being able to dial in directly.

Thanks!

 

[Str8tShtr]

I've always just used a grizzly/Gordy rod with the correct size bushing.

 

[B Nettesheim]

On top of the lands with an indicator, with attention to the groove and its characteristics

 

[DaveTooley]

I dial in directly. Get close on the outside then go inside. With screws finger tight I get close again. Then I look at total swing on the dial. I use the zero as the middle and then when I'm at one extreme I move the saddle to split the total.
Example
Finger tight I have .008" total
Rotate barrel till I'm on either the +/- side.
Move the saddle till the indicator is either +4 or -4
Tweak screws until you get to zero.
For me a 4 groove takes longer because I do so few of them.
I use a pin gage on the muzzles.

 

[tonyben]

I use a Grizzly rod first, then verify with a dial on the lands.

 

[SKWERLZ]

I just use my normal method using a long stem interapid.
They really aren’t that much of a hassle to indicate.
The highs are still the highs and the lows are still the lows.

 

[Excellence In Mediocrity]

Gotcha. Thanks! I think I have my brain wrapped around the 5R a little better now.

 

[DaveTooley]

Tighten slowly, incrementally at the end. Sneak up on it. Don't over tighten until you're done

 

[WayneShaw]

You can slide the proper bushing in the barrel where you want it, then indicate inside the bushing. Then a small amount of fine tune direct.

 

[geo.ulrich]

Another tip use the smallest diameter probe I use .015

 

[Alex Wheeler]

No different than dialing a 4g

 

[Jud96]

You can slide the proper bushing in the barrel where you want it, then indicate inside the bushing. Then a small amount of fine tune direct.

How do you get the bushing back out?

 

[ELR LVR]

How do you get the bushing back out?

Cleaning rod

 

[tobnpr]

You can slide the proper bushing in the barrel where you want it, then indicate inside the bushing. Then a small amount of fine tune direct.

How exactly do you do this- indicate two locations (say, just inside the breech end and the throat), with a single bushing?

 

[ELR LVR]

How exactly do you do this- indicate two locations (say, just inside the breech end and the throat), with a single bushing?

Which has caused the rare idea to pop into my head- why not 3" (or so) bushing to slide in? No more bouncing over lands and grooves... fitment is irrelevant (within reason) as the bushing will ride at the bottom of the bore, just like using a Grizzly rod.

Some of us indicate front and rear of barrel (if the barrel can stick out through the back of the spindle enough)
so one indicator at one end (Breach) , and another indicator at the muzzle
---
As opposed to indicating in 2 spots at only one end
---
the bushing can be used at the muzzle when indicating in for crown work
if a chamber is already cut, no need for a bushing, just indicate inside the chamber

 

[Jud96]

Cleaning rod

That’s what I was thinking that. Not a big fan of that

 

[ELR LVR]

That’s what I was thinking that. Not a big fan of that

I dont understand?
The bushing would not be so tight in the barrel that it would hurt the cleaning rod
usually they have approx .0002" clearance or even if it was tighter, the bushing should not be a press in fit
--->(which I would not be a fan of)
However, I have also made my own Pilot Bushings out of brass
which a person could also use for the dialing in a barrel purpose, use a brass bushing sized to the bore
---
I have used my Dewey which is a stout rod, to pound out stuck bullets
---
So I am not understanding why not use the cleaning rod to simply push out a pilot bushing?
---
Compressed air could likely blow the bushing out too with ease

 

[tonyben]

Some of us indicate front and rear of barrel (if the barrel can stick out through the back of the spindle enough)
so one indicator at one end (Breach) , and another indicator at the muzzle
---
As opposed to indicating in 2 spots at only one end

When would you use this kind of alignment? For chamber reaming and tenon/thread cutting, I imagine using the first 2 to 3 inches of the rifling at the breech end would be ideal with mild runout at the muzzle.

I do use this method as a first step to get my barrel close to aligned, then I switch to measuring the first few inches of the bore. I have also used this method for pre-fit/short-chambered barrels to get the barrel square to the receiver, since I have no idea if the pre-cut chamber was cut in alignment to the original bore.

Just curious to learn.

Thanks.

Tony.

 

[tobnpr]