new reamer vs unithroater for 90's in .223?

[eric n]

Is there any disadvantage using a unithroater on a fresh chamber vs cutting with a spec'd reamer?
I'm quite ignorant on the importance of the minute details of chamber specs. Specifically... Would the issf reamer be better then Kiff's match chamber throated longer?
I have looked through the search but didn't see anything that addressed this.
Thanks
Eric

 

[eric n]

Thanks for taking the time to reply, your responses are well written and full of knowledge. Thanks for sharing.

 

[Mozella]

...... snip....... As far as I know, the only concern I've heard my friends that have used them is simply that you need to be careful and not go past the target depth (fb length). The Uni-Throater is only removing a very small thickness of metal, so proper caution and careful measurement are necessary for optimal results.

You're absolutely correct. I'm not a gunsmith but I play one in my reloading room. I recently used a Uni-Throater for the first time and I can say that it's important to take enough measurements so that you know where you are and where you're going. And, if you're a first timer like me, don't try to make the cut all in one pass. I took three cuts, measuring each time, to confirm that I was doing it correctly and not overshooting the desired dimensions. The actual cutting operation takes VERY little effort and a mistake in setting the reamer could easily result in disaster. I hit my target depth exactly, but I felt much better by aiming for half way on the first cut and proceeding from there.

 

[cardman5448]

Is there any disadvantage using a unithroater on a fresh chamber vs cutting with a spec'd reamer?
I'm quite ignorant on the importance of the minute details of chamber specs. Specifically... Would the issf reamer be better then Kiff's match chamber throated longer?
I have looked through the search but didn't see anything that addressed this.
Thanks
Eric

 

[dkhunt14]

I was told by a good gunsmith that the unithroater cuts a smoother throat, not as much little grooves from the reamer. I can't verify, just passing on what I was told. Matt

 

[Dgd6mm]

Is there a video on setting one up and using it? I plan on doing a .243 barrel I just received. I also need to throat other calibers also.

Thanks,
Don Dunlap

 

[flatlander]

I use PTG micro collar reamer stops with my throat reamers to insure I don't go past the desired depth. I've used a PTG throating reamer to throat for 90VLDs in a couple of bbls, but got lucky with the 223 AI reamer from PTG. Both Berger 90 VLDs & LRBTs shoot great when seated to max mag length in AI poly mags in that 223 AI.

 

[WayneShaw]

The unithroater comes with a t-handle and a chamber sleeve which is adjustable for depth. A normal throater does not. At least the unithroaters I have come with the adjustable stop and handle.

 

[Mozella]

The unithroater comes with a t-handle and a chamber sleeve which is adjustable for depth. A normal throater does not. At least the unithroaters I have come with the adjustable stop and handle.

I think you can buy a uni-throater with or without the handle. That makes sense if you want to buy a second one for a different caliber. I think what makes it different from a simple throat reamer is the rear bushing and adjustable stop rings.

 

[amlevin]

I was told by a good gunsmith that the unithroater cuts a smoother throat, not as much little grooves from the reamer. I can't verify, just passing on what I was told. Matt

I do know that the throat that was cut in my last .223 build by a unithoater was as smooth as a baby's butt. When I got a chance to "scope" other chamber and throats that were cut entirely by the reamer, not so smooth. Some litterally had marks that looked like small notches on the "ramps" of the rifling in the throat area.

Was it the unithroater or just the skill of the 'smith. I guess I'll find out after a few more barrels