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Possibly an Odd Bore

26 Jan 2020
@ 02:52 pm (GMT)

Ryan Nafe


I’ve been doing a bit of observation of the bore of that 2008 vintage Remington 700 of mine, and I’ve noticed two things that seem contradictory:

- I can clearly see gun drill wormskin marks in the bore, but it also doesn’t appear to be a particularly heavy or fast fouling bore.

What’s the deal?

Now to be clear, I’ve muddied the waters a bit by using a mild copper solvent (Hoppe’s #9) after each of the three total boxes of 20 rounds that I’ve fired. But his was done with not much more than a half hour of soaking in the bore. After a half hour or so I scrub over the Hoppe’s with a bronze brush a dozen times or so, and then clean it all out and re-oil it for storage.

I’ve never gone so far as to use Bore Tech Eliminator to fully remove all the copper, and I’ve fired entire boxes of ammo through the rifle in between fairly minimalist cleanings. And yet, it just doesn’t seem to foul to a serious degree.

I guess the only thing that really matters is that the rifle as a whole unit appears to be giving me 1 to 1.5 MOA and isn’t doing anything odd as far as random fliers or double groupings, so it’s not some kind of emergency or big problem, I just thought it was kinda contradictory and strange to have a visually disfigured/rough bore that doesn’t seem to foul heavily.


28 Jan 2020
@ 03:36 pm (GMT)

Grant Lovelock

Re: Possibly an Odd Bore
Hey Ryan,
I have looked up my fair share of barrels, rem 700 and others.... and although there are general rules that logically should apply, they are not set in stone.

Most Rem 700 barrels have Bore reamer marks in them, and also their chambers are not always that accurately cut true to the bore axis.

This being said, the majority of them shoot fine and as you say, they dont seem to copper foul too much.

I changed out a .243Win barrel once for a bloke, accurised the action and fitted a 260 Rem barrel for him. He had mentioned he wanted to on-sell the 243 barrel so I graded it for him so he could tell prospective buyers what it was like, I noticed this factory chamber was definitely not central to the bore, and advised him he should point this out to prospective buyers, he replied saying it was a 1/4 moa shooter all day long.... go figure....
28 Jan 2020
@ 05:12 pm (GMT)

Ryan Nafe

Re: Possibly an Odd Bore
Grant Lovelock, as in True-Flite barrels? Hmmm.

I don’t wanna make an appeal to authority or anything like that, but I have to say, whatever you’ve got to say on this topic at this point in your career and research carries enough weight in my mind that I’ll take your word for it.

Thanks for the information, Grant, I suppose I’ll just carry on using it and see what happens, if anything.
29 Jan 2020
@ 08:44 am (GMT)

Grant Lovelock

Re: Possibly an Odd Bore
Yup.... that
Yeah as you say, it is performing to a satisfactory level that suits your needs, so just keep an eye on that performance, if it holds then there is no real problem worth being concerned about.



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