Quoted: Quoted: Hi all.
I was wondering what has been the experience with carbon fiber barrels. I purchased one for a 10/22 with the idea that it would not need tuning (Eg., the BOSS system), it would have good heat dissipation, and the light weight would be an additional plus.
Although it has only been shot once at 50-100 yards, my initial impression is that the first shot is a flyer (maybe pulling one-inch to the right at 100 yards). The remainder seem okay (considering the distance).
My thought is that the barrel cools too quickly; therefore, all shots should be fired at once (with one practice) or that all shots should be made about 5 minutes apart (no way!).
I was hoping someone else with more experience with carbon fiber barrels may be able to shed some light here.
Thanks!!!
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As you have probably figgered out, the CF barrels are turned to a minimum diameter along the body of the barrel and then laminated with carbon fiber/epoxy, basically a lightweight and very strong fiberglassing. It weighs next to nothing and is very strong and extremely heat tolerant (its used in brake pads on Forumula One Cars: they glow red hot in use), making it a good material to use in this application. I warn against believing the 'heat dissipating' hype: carbon fiber is actually a very good thermal insulator and will hold heat on the barrel core; you can put heat on the barrel a lot faster than the barrel can shed it. I don't think you'll find this a problem in a 10/22 unless you cap off several 30 round banana clips nonstop.
First round fliers are a problem with some semi-autos, and in the .22 it likely relates to the seating of the first round in the chamber. If this barrel has a match chamber, it actually will jam the bullet up into the barrel up to .050". If the first round isn't pushed completely up in the chamber, it changes the headspace, and hence the flier, and all the other rounds in the mag fall into the group, until you change the magazine again. It might also be residual lube in the barrel if you are using solvents to clean. Most .22 group shooters get around this by dumping a few rounds in the berm before shooting groups.
As far as not needing tuning, well, there is nothing magic about carbon fiber. These barrels are as susceptible to harmonics as an all steel barrel, the exception being a barrel that has been tensioned before being laminated. These are pretty expensive, but the tensioning helps reduce barrel vibes and improves overall grouping.
Hope this helps. I don't think you've got any problems you wouldn't normally expect with a regular barrel, and if it performs well other than the 1" at 100yds flier (hell, all mine are fliers at that range with a .22), consider yourself in good shape and shoot.
shooter