[B]LAST UPDATE[/B] 16X Mk4 & borescope pics <800 rounds sudden loss of precision

[95fordfleetside]

Does that gouge have chrome in it? If so then it was like that from factory and was present when accuracy was good. I can't tell from the picture, if it doesn't have chrome then it could have been a flaw in the barrel that was exposed after firing

[TomMcC]

I doubt the chunk out of the land is the problem, why? Because the gas port has taken a whole land out and not affected accuracy. Have you looked at the rifling in front of the leade?

[308sako]

I doubt the chunk out of the land is the problem, why? Because the gas port has taken a whole land out and not affected accuracy. Have you looked at the rifling in front of the leade?

Yes, and while the rifling starts in a rather irregular pattern, i.e., not perpendicular to the bore... It is not showing any problems.

[TomMcC]

Yes, and while the rifling starts in a rather irregular pattern, i.e., not perpendicular to the bore... It is not showing any problems.

That's good. Didn't think it would be bad after only 800 rds but it doesn't hurt to check.

You got a buddy that knows how to shoot you could let have a go at it? Sometimes we just lose our mojo for a bit.

[mpom]

I doubt the chunk out of the land is the problem, why? Because the gas port has taken a whole land out and not affected accuracy. Have you looked at the rifling in front of the leade?

Very perceptive and it makes sense!

Mark

[308sako]

You got a buddy that knows how to shoot you could let have a go at it? Sometimes we just lose our mojo for a bit.

So if I'm shooting my Creedmoor on the same day and only getting this at 100 yards

I should ask for help...?

OK I will :-)

[georgeib]

Any update to how the gun is shooting with a known good optic?

[308sako]

Yes in the original post

[georgeib]

Yes in the original post

Thanks.

[TomMcC]

So if I'm shooting my Creedmoor on the same day and only getting this at 100 yards

I should ask for help...?

OK I will :-)

Nice, but ya know some of us aren't mind readers. I'm sorry I said anything.