breaking the edge of a muzzle crown?

[ppb]

I am not sure I like the inside edge of the crown where it meets the bore on this gun and I am thinking I need to break that edge a little bit. It is not my intention to fully cone the muzzle.

However, I did just finish watching Mike Bellevue's video of the J. Woods coning tool. Thinking that type of tool would be helpful, I made one (sort-of).

The smooth bore is .577". The barrel guide on the tool is .573" The process shown in the video shows the work being done with the muzzle up - which in turn allows grit and stuff to go back into the bore which is readily cleaned out - in that rifle. But what about a smoothbore where there is no groove(s) for the grit to migrate into.

The question I have now, is - How do I prevent the grit generated by the process from causing the tool to seize in the barrel?
- smaller diameter bore guide?
- put some flutes on the bore guide?
Thanks in advance for any comments you may have!

 

[Phil Coffins]

That’s quite the tool! How about setting the tool up so it’s pointed up and place the barrel over it so gravity is working for you.

 

[rich pierce]

I’m not sure about the concern. Maybe stick a wad of cloth further down the bore and pull it out with a worm when done.

 

[ppb]

That’s quite the tool! How about setting the tool up so it’s pointed up and place the barrel over it so gravity is working for you.

Hmmmm...
You may be onto something there...

 

[user 48679]

As Rich refers to ( aka the K.I.S.S. principle ), some cloth slightly downbore will remove any cutting lube/debris when it's pulled out.

 

[ppb]

I’m not sure about the concern. Maybe stick a wad of cloth further down the bore and pull it out with a worm when done.

Thanks for your input.
I would be doing that anyways - my worry is how to prevent the grit from getting between the bore guide and the barrel causing the tool to be bound-up in the bore.

 

[ppb]

Done.
After much consternation and flip-flopping, I decided to do exactly what I was trying to avoid. I just pulled the barrel and very carefully chucked it up in the lathe and eased that sharp edge off with a de-burring tool.

Besides finishing this project, I also now have a tapered piece of brass that I'll call shop artwork for remembrances - and another Senior Moment to chalk up...

 

[springfield art]

I am not sure I like the inside edge of the crown where it meets the bore on this gun and I am thinking I need to break that edge a little bit. It is not my intention to fully cone the muzzle.

However, I did just finish watching Mike Bellevue's video of the J. Woods coning tool. Thinking that type of tool would be helpful, I made one (sort-of).

The smooth bore is .577". The barrel guide on the tool is .573" The process shown in the video shows the work being done with the muzzle up - which in turn allows grit and stuff to go back into the bore which is readily cleaned out - in that rifle. But what about a smoothbore where there is no groove(s) for the grit to migrate into.

The question I have now, is - How do I prevent the grit generated by the process from causing the tool to seize in the barrel?
- smaller diameter bore guide?
- put some flutes on the bore guide?
Thanks in advance for any comments you may have!

If I was going to just gently 'break the edge' I'd use my finger and some oiled, fine, emery paper, very easily dull that sharp edge with hand only. (Just me).

 

[user 48679]

Thanks for your input.
I would be doing that anyways - my worry is how to prevent the grit from getting between the bore guide and the barrel causing the tool to be bound-up in the bore.

Use some cutting oil on the bit.

 

[Rifleman1776]

I often used just a fine and dry emery paper. Just a twist or two with my fingers did it. Never had any ill effects.

 

[Trapper Scott]

Done.View attachment 172244
After much consternation and flip-flopping, I decided to do exactly what I was trying to avoid. I just pulled the barrel and very carefully chucked it up in the lathe and eased that sharp edge off with a de-burring tool.

Besides finishing this project, I also now have a tapered piece of brass that I'll call shop artwork for remembrances - and another Senior Moment to chalk up...

or you can do this

 

[Billy Boy]

I am not sure I like the inside edge of the crown where it meets the bore on this gun and I am thinking I need to break that edge a little bit. It is not my intention to fully cone the muzzle.

However, I did just finish watching Mike Bellevue's video of the J. Woods coning tool. Thinking that type of tool would be helpful, I made one (sort-of).

The smooth bore is .577". The barrel guide on the tool is .573" The process shown in the video shows the work being done with the muzzle up - which in turn allows grit and stuff to go back into the bore which is readily cleaned out - in that rifle. But what about a smoothbore where there is no groove(s) for the grit to migrate into.

The question I have now, is - How do I prevent the grit generated by the process from causing the tool to seize in the barrel?
- smaller diameter bore guide?
- put some flutes on the bore guide?
Thanks in advance for any comments you may have!

Just put a tight patch on the tool snd pull all the curd out when you remove the tool.