Nonconcentric throat? (.284 win chamber problem)

[ExPiney]

So...

I recently had a .284 win built. The reamer had a shorter than desired throat, so the smith used a throating reamer to get our desired freebore. Recently I scoped the bore while cleaning, I noticed that it looks as if the throat is not perfectly centered on the bore (throat intersects with rifling differently as you rotate camera). I've attached a video to (hopefully) illustrate.

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To those of you who are gunsmiths, or who have seen many more chamber/throats than I have, is this likely to cause accuracy issues? Seems like a bullet engaging the lands non concentrically isn't ideal to me, but I'm still fairly new to this.

I have shot the barrel for a 20 round break in, and a 20 round load development. The accuracy of the development wasn't great, but this was only 1 powder/bullet combo.

Thanks in advance for any input. I'm not sure if I want to spend any more time and money on developing a load for a handicapped barrel.

jcs

 

[Northridge]

though the visual inspection is not optimum , with proper work up with powder ladders and a favorable bullet likely you will find a place platform will shoot..

Shawn Williams

 

[LC Tikka]

Have it corrected, seems you wanted a quality build so don't settle for less.
LC

 

[KenOath]

Tune it /shoot it..If it doesn’t perform fix it..

 

[ChrisNZ]

A not-unknown "feature" of some of the last Rems. One I saw was a full 40 thou eccentric.

 

[MikeT49]

Shoot it and see if it performs to your expectations. I had a new .243 that would spit flyers every once in a while. Got me scratching my head. Bought a borescope which revealed a "crooked throat". Barrel is now a garden stake.

 

[yukonal]

I'd like to hear from a couple gunsmiths...but I don't like what I see.

Maybe try the gunsmithing forum.

 

[Alex Wheeler]

It's in your head now. If you paid for a job done right that's what you should get.

 

[spitfire_er]

Looks off, but take 3-4 photos at 90 degrees to each other, reference the case mouth line in the barrel to get it in the same spot every time, then you can compare and get a better idea how far off it is. Looks like a factory Remington barrel throat.

 

[6MMsteve]

choot it you never know, could be a hummer

 

[Ggmac]

Once it gets between your ears , its always going to be second fiddle.

 

[Konrad.INc]

If it shoots good then just shoot it. If it doesn’t shoot good then take it back. That bore scope is going to do more to scare you than anything else. Look at a barrel with 1k rounds on it with all the heat cracking and worn throat. Youll wonder how it even shoots. I’m certainly not the most experienced gunsmith, nor is it my day job but, I also understand that your looking for quality (literally everyone who wants a gun built is). I’ve never seen someone walk into a gun shop or to a gunsmith and say “I just want an ok gun/barrel job”. Having said that I haven’t seen a true correlation between what the inside of a barrel looks like (new or used) and how it actually shoots. There are certainly ugly but new looking factory barrels that shoot good and crappy looking 1k round used aftermarket barrels that do as well…..but the opposite is also true. So the end result is if it shoots good then just shoot it and don’t worry about it. If it doesn’t shoot then you certainly have a leg to stand on for your gunsmith to redo it.

BTW not sure what your load is but try 54gr H4831SC and a 180 hybrid or a 183smk both loaded .030 off the lands. I haven’t seen a 284 yet that won’t clean 600 with that load.

 

[Khaymkhaym]

I certainly dont like the looks of it and I would send it back to the smith who did it. At this point, like Wheeler said, its in your head and if you think something is wrong with your rifle, it always will be. Makes it a lot harder to improve when you have an area of doubt to cast on any mistakes made.

 

[jackieschmidt]

When using a Throater, attention must be paid to the bushing fit. That bushing is what is aligning the cutting flutes to the lands.
Of course, it can’t be so tight that it can’t be inserted, And it can’t be so loose as to allow the cutting edges to drift off center.

 

[Sniperhandle]

Do a chamber/throat cast, Then there will be no guessing? Weird pic angles or eyes playing tricks on you, And like I always say, Tricks aren't just for kid's!!