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Do it your self. Its not difficult.

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He didn't do it right the first time so why would you trust him again?

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......

I will not name the gunsmith as I am not going to publicly bash them, as everyone makes mistakes and he is offering to fix it. It just irks me a little that he will not admit to his mistake and denies it completely. That takes away my confidence in them.
I will post up the pictures of the crown when I get home this afternoon.

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I'd use a small sharp carbide boring bar and cut an 11° starting from the inside out. Small cuts. Shoot out the tiny burr.

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I have a older bushmaster A2 rifle that was made during the ban, so it did not have a bayo lug and was not threaded. I sent it to a very highly recommended gunsmith to have a new FSB pinned and have it threaded.
I get it back and everything looks great. I run a patch down to bore to clean out any dirt or crud that may have gotten in it and I noticed it would "stick" right at the muzzle requiring a extra push to make it go all the way through. I run a bore brush through it and another patch. It still "sticks". I notice the crown is not the same crown that was on it when I sent it. It looks like they faced the muzzle for some reason.
I break out my bore cam and have a look. The very end of the rifling is damaged and the grooves has metal displaced into them from the muzzle. This makes a "ring" of a sorts around the muzzle.
I am a hobby machinist and in no way a professional. I have a small lathe and can do some pretty good work with it, but I am not at the skill level needed to cut threads. However, the damage looks (to me) like damage from it being run on a dead center, possibly with no lube. That is about the best way I can describe it.
I email the gunsmith and send him pictures taken with the bore cam. He claims he "never touched" the crown, (even though I can clearly see machine marks on it). However I do not have any pictures of the crown before I sent it. I do know my guns and I know this rifle never had any sort of damage to the crown before the threading. He denies doing the damage or having anything to do with it. He did however offer to recrown it for free if I sent it back to him.
I inquire about how he does it, if he turns between centers and he says he does (that tells me right there the damage was done by a center). However he claims the centers have never done this before and says something about it might have had carbon buildup or some such. I can tell you it did not have any, cause it was a bare muzzle. The only time I get carbon buildup on a muzzle is on guns with muzzle brakes or flash hiders. He says he went to the shop and took a old barrel and tried to damage it with the centers and "could not"

So my question, do I send it back to him (on my dime) and let him try and fix it. Otherwise I will fix it myself. I have been looking for a good excuse to buy a crowning tool, this might be it.
My reason for hesitating is, if he did not take the time to inspect his work and make sure it was done right the first time, why should I trust him to do it another time? Turn around time was very fast, so I almost want to think he is just trying to rush them in and back out as fast as he can and not taking the time to inspect his work.

I know in my job (mechanic) if I let a piece of equipment out of the shop that came back damaged or broken because of something I did, I would run a very high risk of losing my job. All work has to be inspected (by the person doing it) to make sure you did it right.

I will not name the gunsmith as I am not going to publicly bash them, as everyone makes mistakes and he is offering to fix it. It just irks me a little that he will not admit to his mistake and denies it completely. That takes away my confidence in them.
I will post up the pictures of the crown when I get home this afternoon.

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I have a personal policy about not allowing people to further fuck up something they already fucked up.

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Send it to grey50beast. He is the Bob Ross of gunsmiths

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We don't know if it's a simple burr or mushrooming from over tightening the live center. A burr isn't a big deal but mushroomed steel could ruin his day.

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We don't know if it's a simple burr or mushrooming from over tightening the live center. A burr isn't a big deal but mushroomed steel could ruin his day.

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You can buy tiny solid carbide boring bars on Amazon with a minimum bore size of .200". I have several that would work. Only take a few thousandths at a time working inside to out with the shortest extension you can get. Short is stiff.

That most definitely looks like mushrooming.


This would work but shorter would be better.

Micro100


Even better.

Another one

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I ended up buying the brownells 11* cutter and pilots for 22 and 30 cal. I have a few other rifles with questionable crowns and no real easy way to chuck them up in my lathe. So I figured this would be a good test run.
The recrown was pretty simple. I had to trim a good bit off till I hit undamaged rifling. But I finally got it.
I finally got the rifle back together last week and got to shoot it to zero it in today. Elevation was pretty simple with a few adjustments of the front sight post. However I had to crank a good bit of windage into the rear sight to get it hitting center. I never touched the windage adjustment from where it was before, so I know it is a good bit off from where it was. I think I had to give it somewhere around 10 clicks. Now my rear sight is almost touching the left side of the sight ear.
So I assume the FSB is canted. I can eyeball down the top of the carry handle and it looks like it is just ever so slightly canted to the right.

This just keeps getting better and better. I have not contacted the gunsmith yet. Kinda wondering if I should even bother. Not sure if I would ever want him to touch anything of mine ever again.

So should I even bother trying to have fixed? I have a bad feeling it would cost more than it is worth to fix it right, now that is has already been drilled and pinned. Should I just deal with not having much windage adjustment and just live with it. After I got it zeroed I was keeping all shots in the 9 ring at 100 yards using some ammo I just threw together with some pulled SS109 bullets, and a thrown charge of 24.5 gr of H335. I'm sure the rifle can do much better with better ammo and a better shooter. I will be the first to admit I am far from a expert marksman with open sights. But I feel like it did pretty good.

Quoted:
I ended up buying the brownells 11* cutter and pilots for 22 and 30 cal. I have a few other rifles with questionable crowns and no real easy way to chuck them up in my lathe. So I figured this would be a good test run.
The recrown was pretty simple. I had to trim a good bit off till I hit undamaged rifling. But I finally got it.
I finally got the rifle back together last week and got to shoot it to zero it in today. Elevation was pretty simple with a few adjustments of the front sight post. However I had to crank a good bit of windage into the rear sight to get it hitting center. I never touched the windage adjustment from where it was before, so I know it is a good bit off from where it was. I think I had to give it somewhere around 10 clicks. Now my rear sight is almost touching the left side of the sight ear.
So I assume the FSB is canted. I can eyeball down the top of the carry handle and it looks like it is just ever so slightly canted to the right.

This just keeps getting better and better. I have not contacted the gunsmith yet. Kinda wondering if I should even bother. Not sure if I would ever want him to touch anything of mine ever again.

So should I even bother trying to have fixed? I have a bad feeling it would cost more than it is worth to fix it right, now that is has already been drilled and pinned. Should I just deal with not having much windage adjustment and just live with it. After I got it zeroed I was keeping all shots in the 9 ring at 100 yards using some ammo I just threw together with some pulled SS109 bullets, and a thrown charge of 24.5 gr of H335. I'm sure the rifle can do much better with better ammo and a better shooter. I will be the first to admit I am far from a expert marksman with open sights. But I feel like it did pretty good.

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ADCO for the win