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I can understand small surface faults, tooling marks etc, but not something that implies inconsistencies in the alloy, or heat treatment of the blank/barstock

Re-Pete

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2 hours ago, Shuggy said:

Here’s what AI has in their instruction manual. It doesn’t take too long. I reckon that they must know a thing or two about barrel accuracy..

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 Shaggy I have followed this for new  6.5 cm barrel fired this morning with a box of factory hornady 120 amax took about half an hour so no big deal , very happy and looking forward to developing a load myself and will clean around every 50 or so shots, job done. To be honest i didn't know until joining this forum that a barrel needed "running in " in the past I've cleaned the barrel to remove factory/proof house muck and then after use Each time.

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Or...they must not make a very good barrel?  Or maybe it was easier to print off that card than it would be to field phone calls from purchasers asking what the run in procedure should be and then having to spend time explaining why it wasn't necessary.

AI's can run $7K and up here. If I spent that money and was then told to run-in the barrel to attain best accuracy, I'd be disillusioned. When I buy a rifle I expect it to be ready to work -and that would go doubly so for a rifle that bills itself as the work horse of the long range shooting professionals. JMO~Andrew

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The barrel above is not a stock AI barrel Andrew....its a Bartlien I made up for Dave on his new A.I. I guess he just wanted to follow A.I's procedure regardless of what barrel was onboard.

it certainly hasn't harmed it.:)

 

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Baldie,

That post slipped in as I was typing. My response was to the post above showing the page from AI's instruction manual. That is certainly some fine accuracy. I immediately wondered if that was three or five shots.~Andrew

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I'm pretty neutral on the barrel break in argument but looked at it this way:  Spending a lot on a new rifle, if some barrel manufacturers (who have no specific agenda or shares with bullet manufacturers) suggest that it is good practice, then for the sake of a few boxes of factory ammo, it seems a sensible step for peace of mind if for nothing else.

I cleaned mine when bought new to remove any proof house fouling, then shot one, cleaned one for a few rounds, then shot 3, cleaned once for perhaps another 9 rounds before shooting 5 and cleaning once for about 15 rounds then shot as usual. It was really noticeable that from new, the barrel copper fouled very quickly with long 140gr bullets (6.5mm) but with a lot of copper surface area being swaged, I'm not entirely surprised.  A lot of coppering was obvious when looking at an angle across the muzzle.  After about 100 rounds, it is still copper fouling but nowhere near as badly as originally so perhaps that is the result of a new barrel bedding in slightly.  I haven't tested MVs yet but aim to now that a fair few rounds have been put down the barrel.

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21 hours ago, Villadave59 said:

To be honest i didn't know until joining this forum that a barrel needed "running in " in the past I've cleaned the barrel to remove factory/proof house muck and then after use Each time.

My point exactly. In that what you didn't know didn't hurt, did it?.. (previous barrels)

Another way to say it?.. 'ignorance is bliss' ;)

 

 

 

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1 hour ago, snakeman said:

My point exactly. In that what you didn't know didn't hurt, did it?.. (previous barrels)

Another way to say it?.. 'ignorance is bliss' ;)

 

 

 

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