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Contour help please

KodiakHunter1

Private
Minuteman
Aug 11, 2009
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0
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This is my first post and I can say that I have read everything I can from this site and appreciate it all. I am building my first rifle and am looking for recommendations on barrel contour. This is to be a light-weight hunting rifle in 6.5x47 L, with barrel length no longer than 24".

What is everbodies opinion on the magic combination between accuracy (thicker contours) and weight? I will flute the barrel (if needed) but do not have the money for a CF barrel.

Thanks for your input!
 
Re: Contour help please

Well opinions are like assholes..., and I happen to be an asshole, so here's my opinion.

It is a hunting rig, so it is highly unlikely you will be laying down a base of fire - two or three shots in rapid succession would probably be max. That being the case, overheating SHOULD not be an issue - so a fairly light contour is not a negative.

Depending on the terrain you hunt and how you hunt (still vs stalk) weight and balance are more important factors. Anything appreciably heavier than a #3 or #4 contour will leave you with a muzzle heavy rifle that might be a bit slower up to the shoulder than a standard (#3 or so) factory contour. Fluting can get the weight of a stiffer profile down into a range that allows for a more nimble rifle, but at some point, a barrel is too thin to flute.

Purely personal opinion time - I think a fluted #4 barrel will give you a rifle that handles like a basic sporter, but has the advantage of a slightly stiffer barrel which should give more consistent groups. If a #3 can be fluted, that would yield a rifle that handles like a featherweight, and still groups well for three or so shots before heat ever becomes an issue.

Of course there are many many other factors and ways of setting up a rifle to trim weight or redistribute weight to get exactly the set-up you want, but as far as the barrel goes, you just have to figure out how to get the stiffness you want for accuracy, while not being so heavy that it becomes unwieldy. Fluting might get you where you want to go, and if that is what you are considering, talk (email, whatever) to Carl Feldcamp at Kampfeld Customs. He is something of a fluting guru.
 
Re: Contour help please

For a hunting rifle I'd look at the Rem Std Sporter contour or the Rem Magnum Contour Fluted which is basically like an LVSF barrel.

Watch when you order a #2 or #3 .... etc contour. Every maker seems to have different numbers. Pacnor for instance is heavier than anyone else I've seen, their #2 is most others #3 or 4.
 
Re: Contour help please

Thanks for the information Doug, I appreciate. I have sent an E-mail off to Karl (waiting for his reply) but I was thinking along the same lines as your suggestion. I know a #3 can be fluted, but lightly (and will the benefits of the limited weight reduction compensate for the slight loss of accuracy?) Got me on this one.

Ultimately I am trying to stay under 6.5lbs (rifle alone) while maintaining excellent accuracy. This has proven much more difficult than I originally expected.

Thanks for your help!
 
Re: Contour help please

De nada - as far as whether or not the nominal weight savings of a fluted #3 will affect accuracy - My gut reaction is that it won't if it is a good barrel. I am a cut-rifled barrel slut. Just my opinion again, but I think cut rifling imparts less stress to the barrel. So using my inspired line of reason, a fluted #3 cut-rifled barrel SHOULD outshoot say a fluted factory #3 or a fluted buttoned #3 (assuming it was fluted AFTER rifling).

I cannot substantiate any of the above with empirical data.

However, if you use a good barrel, you should get a good result.

Before I get flamed by the button-rifled barrel crowd, you might also want to look at Pac Nor - they have a "design your own contour" feature. I have often thought of having them turn me a barrel that is about 1 inch for 4-5 inches then does a dramatic step (radiused) down to about .700 for the rest of its length to finish at 22-24 inches.

Like I need another project.
 
Re: Contour help please

Sounds about right to me as well - I was thinking Lawton 7000 SA with a Rock #3 fluted. Put those into an H&S stock with a decent trigger and be good to go.

Thanks for the input, it helped a lot.