Thread: How crucial is the crown?

Would this slight corrosion affect accuracy? When new (10 years ago) this rifle was about half MOA. The best I can get with it is just shy of 1.5 MOA. This will still (and has) knock down anything within 200m, but I am concerned anything past that will have more chance to miss vitals, and so I’m reluctant to push past that.
What are your thoughts?

@gundoc probably the best guy to ask.

If it was mine I would look at getting it recrowned, or doing it myself using a marble/ball bearing and some valve grinding paste or similar.

What is the inside of it like?
Is the decrease in accuraccy with the same load?

Suppressor left on after shooting it??

nah its buggered.
Give you 20 bucks and a pie for it.

Crown looks fine to me as far as I can tell from the pic. Unless it wasnt cut true from manufacture I doubt it is the problem.
For crown to be faulty or damaged it has to provide uneven gas. You will generally have a lot worse accuracy than 1.5" as well


Sent from my SM-T510 using Tapatalk

Originally Posted by R93

Crown looks fine to me as far as I can tell from the pic. Unless it wasnt cut true from manufacture I doubt it is the problem.
For crown to be faulty or damaged it has to provide uneven gas. You will generally have a lot worse accuracy than 1.5" as well


Sent from my SM-T510 using Tapatalk

Is that like lifting one cheek?

Originally Posted by Gibo

Is that like lifting one cheek?

Probably. Have you got a thermal camera?

Sent from my SM-T510 using Tapatalk

I can guarantee you my gas has never been called uneven. Toxic, vile and lots of other choice words, but never uneven

I can see I should have maybe elaborated a bit more

Sent from my SM-T510 using Tapatalk

Originally Posted by CamFlatt

Would this slight corrosion affect accuracy? When new (10 years ago) this rifle was about half MOA. The best I can get with it is just shy of 1.5 MOA. This will still (and has) knock down anything within 200m, but I am concerned anything past that will have more chance to miss vitals, and so I’m reluctant to push past that.
What are your thoughts?

Attachment 135528

I'm wondering if it's not the crown, but possibly a buildup of copper inside the bore.

The crown actually looks OK but there could be a problem in the bore near the muzzle. Give it a through clean and check the bore from the muzzle end with some magnification. Near the muzzle it takes bugger all to upset accuracy, mind you, 1'5" is fine for most things.

@gundoc shhhhh don't tell him that. Bugger it thought id got a cheapy there lol

Originally Posted by csmiffy

nah its buggered.
Give you 20 bucks and a pie for it.

What kind of pie? Might be a deal breaker..

That would have to be negotiated. Not everyone likes the same pies. Whilst I am partial to steak/ kidney and steak /mushroom I am aware than not everyone else has such refined tastes. As for brands, sheffields pies are good, Pie bin out Rangoon aren't too shabby either. I haven't had enough decent fresh jimmys pies to comment nor Fairlie pies which are meant to be awesome.
There was a pie shop between Hamilton and Tauranga that did as good a pie as I've ever had but only been there once.
I digress-back to rifle stuff