A moron and his uni-throater...

[StumpyJohnson]

If a window licker grabbed himself a uni-throater, made a dummy round of his desired cbto/coal, and got medieval on his barrel and throughout the process never got to the point where his freebore has increased at all...what has occurred?

Spoiler Alert: I'm that window licker. I've checked repeatedly with the dummy round and a bullet comparator and nothing has changed. And I'm still a window licker, that didn't change either.

 

[Pdvdh]

I'm not sure of the question or the answer.

But I will offer this... beware the hand operated uni-throaters. They can cut really quickly, with very little effort.

You could end up with a smoothbore, before you realize what happened.

 

[StumpyJohnson]

My goal is to increase freebore. Yes it cuts fast. The point of tangency is not moving towards the muzzle end as I cut. I guess the questions is...

If I continue to increase the depth of cut but do not see a correlated increase in freebore length, what is going on?

 

[can1010]

if your freebore hasn't increased that just means that it wasn't touching the lands when you started. make sure your barrel is real clean even the copper, back off the adjustment nut and spin the uni throater backwards until you feel contact then set the adjustment nut and cut go slow .010 at a time until you get to desired length

 

[StumpyJohnson]

if your freebore hasn't increased that just means that it wasn't touching the lands when you started. make sure your barrel is real clean even the copper, back off the adjustment nut and spin the uni throater backwards until you feel contact then set the adjustment nut and cut go slow .010 at a time until you get to desired length

Did that, I'm cutting I can tell by the swarf/chips. No increase in CBTO.

 

[Pdvdh]

And if it's cutting steel and you're not measuring increasing throat depth... stop cutting further until you figure out why you can't measure the increased throat depth.

It sounds like you're getting metal shavings. You'll have the mother of all Weatherby freebores if you don't find a good method to measure your freebore and you continue cutting.

 

[Coyote Shadow Tracker]

If a window licker grabbed himself a uni-throater, made a dummy round of his desired cbto/coal, and got medieval on his barrel and throughout the process never got to the point where his freebore has increased at all...what has occurred?

Spoiler Alert: I'm that window licker. I've checked repeatedly with the dummy round and a bullet comparator and nothing has changed. And I'm still a window licker, that didn't change either.

You know the old saying measure twice and cut once.
What are you using to measure??? What is the "Dummy Round" I suggest that you use something like a Hornady Modified Case to see exactly if you are cutting away the Lands and where your Ogive is and want to be.
You can cut really fast with those Uni Throaters.

 

[can1010]

take the above advice, your way of measuring is letting you down it needs to be straightened out. the only other possibility is the shavings you are seeing is from cutting a larger freebore diameter and not moving the lands forward.

 

[Pdvdh]

That's a scary thought.
Whatever's being cut isn't being measured. Therein lies the conundrum.

How do you spell ... Teslong ...

 

[StumpyJohnson]

And if it's cutting steel and you're not measuring increasing throat depth... stop cutting further until you figure out why you can't measure the increased throat depth.

It sounds like you're getting metal shavings. You'll have the mother of all Weatherby freebores if you don't find a good method to measure your freebore and you continue cutting.

Yea, I guess I'm just bewildered as to why the freebore isn't moving. Thanks for your input.

 

[Coyote Shadow Tracker]

Shooters have different ways of measuring so take it for what it is worth.
We use the:
Amazon product ASIN B000PD01SI
Amazon product ASIN B000PD5VLA
You will also need a Modified case. We can make one for you for Free if you send us you Brass Case.
Send a PM if you want more info.
Thanks
Len & Jill

 

[Coyote Shadow Tracker]

Yea, I guess I'm just bewildered as to why the freebore isn't moving. Thanks for your input.

It's probably moving you just are not measuring it.

 

[338 dude]

Did that, I'm cutting I can tell by the swarf/chips. No increase in CBTO.

If you're getting chips it's cutting something

 

[Coyote Shadow Tracker]

What cartridge are you cutting the throat for ?
Amazon also Has Modified cases rather inexpensive if they have your cartridge. If not we can make you one for free.
Let me know if you want to sell your Uni-Throater after you are done using.
Thanks
Len & Jill