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Centerfire Rifles - Manually Operated Lever action, bolt action or other non gas operated centerfire rifles. |
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#2
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My experience is they are crap, but my data is 20 years old so maybe they are better now. It behaved like a lightweight sporter barrel, heated up fast and groupings were trash untill I put a pressure pad on the stock.
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#3
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A very few PRS competitors use them but I can only assume that they're not paying for their barrels. I've never seen any on the F-class line. I assume that's because F-class is expensive enough without CF barrels. CF are just more expensive IMHO. The ones I've been able to use a lot were just as accurate as any of my match guns with conventional barrels. Made hunting with a heavy barrel profile a lot more pleasant. If weight is a major issue, they do deliver on lighter overall weight but so far it seems like an answer to a question nobody asked. Long range usually has high round counts and/or highly overbore chamberings which are hard on barrel life. CF wrapped barrels end up double or more than the cost of a fine non-CF custom barrel.
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#8
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If you want to spend some money, why not? If you're trying to improve your ability to hit the target at that distance, it seems to me you'd be better off using whatever rifle you have that can reach that far and focus on learning how to read the wind, which is likely to have a much better return on investment in time and money than an expensive barrel.
Probably not what you want to hear but at that distance, wind is going to be a much bigger factor than any improvements you might or might not realize from a stiffer barrel. For example, a factory load for a .30-06 Springfield with Hornady 150 grain SSTs drifts roughly 3 MOA for every 5 MPH of wind. I might be wrong about this but it seems like the difference between a sporter barrel and a varmint barrel isn't going to be nearly as important. |
#9
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If you have a weight limit you can't reach it makes sense but if weight isn't an issue they tend to be pricey.
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Lynn Dragoman, Jr. Southwest Regional Director Unlimited Range Shooters Association (URSA) www.unlimitedrange.org Not a commercial business. URSA - Competition starts at 2000 yards! |
#10
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#12
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Carbon wrapped bbl for hunting. Stainless for matches.
Check out Bartlein's new material 400MODBB, suppose to have better barrel life. You can also order the new material with carbon fiber wrap. But wait times are very long nowadays. |
#14
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Look at what the bench rest guys shoot. When only accuracy matters, everyone shoots stainless steel.
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Frank One rifle, one planet, Holland's 375 Life Member NRA, CRPA and SAF |
#15
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High quality ones are good, but I would only go with the extra expense if saving weight is the primary concern. Just for the record, I do have a Proof barrel for my AI and I love the weight saving. It doesn't sacrifice any accuracy, but it's not inherently more accurate than my non CF barrels either. I got it just for the weight savings.
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NRA Benefactor Life Member NRA Certified Pistol, Rifle & Refuse To Be A Victim Instructor American Marksman Training Group Visit our American Marksman Facebook Page Diamond Bar CCW Facebook Page NRA Memberships at Discounted fee |
#17
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CF barrels are about weight saving. Which is huge if you actually hunt.
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#18
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No! Actually it's the opposite.
CF is an incredibly efficient heat conductor and dissipator. The reason a CF wrapped barrel feels hot is because the CF brings the heat away from the steel and to the surface to dissipate. OTOH, stainless is a very poor conductor of heat and will hold heat closer to the rifling for longer and will dissipate heat at a slower rate.
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Vae Victis |
#19
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6. Heat conduction
Carbon fiber is a material with low heat conduction characteristics. Carbon fiber thermal conductivity Carbon fiber is a perfect insulator– the above photo shows a carbon fiber turbine inlet. Heat conduction mainly depends on transfer/conduction of energy from areas of high temperature to areas of low temperature. Highly heat conductive materials transfer temperature more easily than materials with low heat conductivity. Composite made from carbon fiber and epoxy resin is a material with heat conductivity x 40 times less than aluminium and 10 times less than steel. Therefore the assumption may be made that carbon fiber is a very good insulator.
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Lynn Dragoman, Jr. Southwest Regional Director Unlimited Range Shooters Association (URSA) www.unlimitedrange.org Not a commercial business. URSA - Competition starts at 2000 yards! |
#20
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The hype language from the product pushers can get confusing if not purposely misleading. |
#21
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Actually carbon fiber is both a bad and good thermal conductor. Normal cf is bad. But there are some with really high thermal conductivity cf made for satellites, $$$$$.
The other problem you run into is thermal expansion, more the lack of thermal expansion in cf, creating stresses in the steel barrel. |
#22
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In the 90's the very first CF motorcycle exhaust I saw... The rider stopped and the rest of us looking at it.... he says Check this out! And grabs the can.....
Everyone else looking with jaws on the pavement... and goes up to touch it. It was rather warm... but a regular can would instantly melt the top layer of your skin. Yep.... sounds like an insulator to me..... |
#23
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Like I said there are high thermal conductivity carbon fiber developed for space applications. The thermal conductivity is over twice that of copper.
https://sanyocorp.com/pitch-based-carbon-fiber/ |
#24
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Now LynnJr, Since you didn't link your quote, I have no idea where it's from, although it looks to be a very specific application for aeronautical turbine blades made from special resins, so I don't think it applies to standard CF materials supplied in sheets. Carbon Fiber is "carbon" threads, which have a thermal conductivity of about 500 W/mK (watts per meter-kelvin), compared with about 400 W/mK for copper. It is an efficient heat conductor.
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Vae Victis |
#25
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#26
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The typical carbon fiber like Toray T300 or T700 has a thermal conductivity down at 20-40 W/mK.
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#27
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I was recently amused to discover the high-end cookware maker, All-Clad is selling $$$ cookware made from CF sandwiched between 2 sheets of stainless. Their claim is that these pots conduct heat faster & more evenly than their copper & aluminum lined pots.
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Vae Victis Last edited by CWL; 08-27-2021 at 8:59 PM.. |
#28
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Don't know, but isn't Toray a maker of aeronautical applications like drone frames? Perhaps the materials are prepared to be insulative. Still does not take-away the conductivity of actual CF itself. There would be no change mollecularly, with carbon threads formed & weaved into CF, it would be what resins & other composites are used.
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Vae Victis |
#29
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Toray is one of the largest suppliers of carbon fiber used in aerospace, automotive, and sporting goods.
I don't think you are understanding the actual behaviors of carbon fiber. CF can conducted thermal energy if it is applied to the length of the fiber, like a straw. However when the thermal energy is going across the width of the fiber, it becomes an insulator. Epoxy is also a good insulator. The fact that the fabric is laid on its side with an epoxy filler makes it a very good insulator. It's only the high dollar space stuff that is actually thermally conductive. Your run of the mill CF is an insulator. |
#30
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CWL
If it was as you claim everyone would be using it as heat is the biggest enemy of rifle barrels. The manufacturers would be marketing it to high heaven but they aren't. Ask yourself why.
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Lynn Dragoman, Jr. Southwest Regional Director Unlimited Range Shooters Association (URSA) www.unlimitedrange.org Not a commercial business. URSA - Competition starts at 2000 yards! |
#31
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Notice that PRS and F-class, both high round count shooting sports, don't readily go with CF barrels? Considering that there are some weight limitations they would be totally jumping on it. The general consensus is the heat kills the barrel accuracy.
Last edited by smoothy8500; 08-30-2021 at 2:20 PM.. |
#32
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Finally someone.......
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carbon fiber barrels are great if you can afford it, since you are asking, you probably can afford it. So, go for it. IT is very nice and very accurate. I've Christensen and I love mine. |
#33
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Besides the weight savings, a CF barrel pushes a rifle center of balance back towards the receiver, making a long hold on a target much easier.
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