I personally like the 110* better. No reason behind it, I just do.

 

If you can get hold of the February 2012 issue of Precision Shooting, there's an excellent article about crowns on page 8. I figure a person with crown cutters might have copies of this wonderful, but sadly departed, magazine.

 

I'm guessing you mean an 11º crown as I've no idea how you could cut a 110º crown, 11º is a common target crown option.

 

I knew what he meant. I guess it depends from what direction your counting from.

 

I run an 11 deg on mine and carry it from the bore almost to the outside of the barrel. different, but it works for me. Whatta Hobby!

 

The cutters are regulated as the angle between the respective cutting edges,which is either 90° or 110°.

 

Don't know how they get 90º and 110º out of those but okay...

 

Neither of them cuts a crown angle equivalent to what it says, that's for sure.

 

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The tool doesn't cut 90° and 110° crowns, they are as I stated the angle between the cutting edges.

So in fact the 90° tool will cut a 45° crown and the 110° will cut a 35° crown.

The drawing I made may help those who don't see it...

 

The tool doesn't cut 90° and 110° crowns, they are as I stated the angle between the cutting edges.

So in fact the 90° tool will cut a 45° crown and the 110° will cut a 35° crown.

The drawing I made may help those who don't see it... View attachment 377264

I see what you're saying but it's a backwards way of stating it in my opinion...but that's just me and obviously a few others. Carry on. 😎 I'm accustomed to it being stated as the angle of the finished crown, guess it's a matter of perspective.

 

Looks like not only a different convention as far as expressing the angle of the crown, but also a different approach-those are some deep crowns…

 

You don't go full tool width with them - only use to shave a little off- maybe even a fifth of barrel wall thickness if that

 

We have to remember LewisM is looking at this from a point 180 deg from most of us. Which direction does the water spin in a flushed toilet down under? Which side of a horses neck does it mane hang? And so on, too infinity and beyond! Man I need some coffee. Happy Daze guys.

 

I thought most target crowns are 11degree?

 

I'm starting to regret opening this obviously confusing can of worms.

Anyway, here's Keith recrowning a Model 2 exactly with these cutters:

 

And here we have Brownells even mentioning the 45° crown angle - achieved using a 90° crown cutter. Not all crowns are 11° CZ factory crowns sure aren't.

Making sense yet?

 

And here we have Brownells even mentioning the 45° crown angle - achieved using a 90° crown cutter. Not all crowns are 11° CZ factory crowns sure aren't.

Making sense yet? View attachment 377288

Didn’t watch the video but it appears to me that what is being discussed is a chamfer to the bore vs angle the crown is cut which doesn’t have a separate chamfer at the bore. Like what the Mason Crown cutter does.

 

Well , i like the look of the concave muzzle. But Id always get the one with the thicker rim , just more protection.
Are we mixing up chamfer and crown here? Chamfer being the edge of the bore and crown being the surface area at the end of the barrel? Like a threaded barrel has a chamfer but no crown.

 

Neither of them cuts a crown angle equivalent to what it says, that's for sure.

I think the confusion about the cutter picture is due to the different ways the Europeans and Americans describe angles. That cutter is from Serbia. If somebody has the same shape cutter from PTG I'll bet it's labelled differently.

 

I've always used a 90° (as per Lewis's diagram).
This gives a 45° angle at the very lip of the bore.
Never used those wee cutters (but they do look like a neat idea).
I set my barrels up in a lathe with 4 jaw chuck and a dial gauge on the bore.
Yeah, takes forever to setup but it does give a nice accurate chamfer.
I might have to get me some of those wee cutters.
I like the crown similar to the photo (which I stole off the interweb).
Not quite as recessed in as this, and with just the slightest chamfer out to the outside edge of the lands.

 

Thats essentially the crown of the 452 American, CZ527 American etc. Works well.

 

Yep, and my new 455 Varmint bull barrel is the same too.
I started doing this style of crown/chamfer about 40 years ago.
Don't have a lathe now (moved into a 'lifestyle village' unit and no spare room in the wee garage).
But those wee cutters you show do look interesting. What/where/etc details please?
Thanks.

 

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I’ve used only a few times, but I’m glad I bought the Dave Manson crown cutting tool system

 

Lewis sir , you are good. Looks like good lively conversation where everyone is learning. Not everyone looks at things from and engineering view point or from the same angle.
I see no arguing but I do see some learning on everyone’s posts. You are doing well and obviously learned in your craft. You want some angle but not a lot of angel on your crown but as a target crown goes as long as the break between your crown and your barrel is square all the way around is the most important and the angle in degrees is less important to accuracy and more a personal choice.
I personally like a shallow crown anywhere from 11 to 30/40 degrees from bore to the barrels edge and care less for having any step at the edge.” All most all mine right now are what the factory did but hopefully one day soon I will get a chance the recut them all with and 11 deg crown”.
It’s been a long time since I worked with any machines “ mills and breaks “.

the sky is your limit and your crown design can be anything you want as long as it’s consistent the whole diameter at the lands and groves. Past that the angles are your playground.

 

the sky is your limit and your crown design can be anything you want as long as it’s consistent the whole diameter at the lands and groves. Past that the angles are your playground.

Chamfering and lapping the bore didn't help much with this Mini14 so I tried to take out the big crown scratch @ 5:00.

 

You whizzed that crown cutter so fast you friction heat blued it