Fiftydriver
Official LRH Sponsor
BD408,
That is what I was curious about, figured it had to be a carbon fiber barrel and not an all steel pipe.
What is your opinion of the stiffness of the carbon fiber barrels at this lenght. I have fitted several of them and all have been extremely good shooting rifles in the end but I will say that when I chuck up the muzzle end of a carbon fiber barrel in the lathe and get ready to chamber it, it is no where near as stiff as an all steel barrel, even a smaller diameter steel barrel.
By this I mean that it takes very little pressure at all to flex the barrel when the lathe chuck is holding the last 4-5" of barrel and the barrel is hanging unsupported at the breech.
A #5 contour all steel barrel seems to have about the same amount of flex at 30" at a carbon fiber barrel, even a 1.250" straight cylinder barrel.
Comparing a #7 or larger all steel barrel to the stiffness of a carbon fiber is not even a comparision, the all steel takes alot more pressure to get it to flex then the carbon barrels.
Now obviously, for the rounds I have chambered in these carbon fiber barrels, they are certainly stiff enough for fine accuracy but I am just curious about when you put the powder to them in a 338 Allen Magnum with a 300 gr SMK loaded to 3450 fps or even more of a strain when you drive a 350 gr ULD RBBT to 3250 fps.
We are playing with the idea of a 400 gr 338 bullet as well and this will add dramatically to the stress on these barrels. Will they take it?
Just wondering what velocity you are loading your personal rifles to and at what barrel length you have on your 338 Sniper Tac.
What gets me is the barrel cost, ****!!! They have to have twice the barrel life because they cost more then twice what an all steel barrel runs!!! /ubbthreads/images/graemlins/grin.gif /ubbthreads/images/graemlins/grin.gif
From the barrels I have chambered though, the ABS barrels appear to be the real deal. Everyone has been a shooter that I have fitted and for light weight they are nearly impossible to beat. I just wonder if there is a limit to the stress they will handle consistantly.
I know my barrel in the lathe experiment does not tell alot of scientific data but from what I see, as far as stiffness alone is concerned, an all steel barrel of a #7 or higher offers dramatically stiffer barrels then a carbon wrapped barrel.
Does this hurt accuracy, does not seem to so far, at least not in a 30" or shorter barrel in a round the class of a 338 RUM but we are talking alot more snort with our babies!! /ubbthreads/images/graemlins/grin.gif
Just curious what you have found.
Kirby Allen(50)
That is what I was curious about, figured it had to be a carbon fiber barrel and not an all steel pipe.
What is your opinion of the stiffness of the carbon fiber barrels at this lenght. I have fitted several of them and all have been extremely good shooting rifles in the end but I will say that when I chuck up the muzzle end of a carbon fiber barrel in the lathe and get ready to chamber it, it is no where near as stiff as an all steel barrel, even a smaller diameter steel barrel.
By this I mean that it takes very little pressure at all to flex the barrel when the lathe chuck is holding the last 4-5" of barrel and the barrel is hanging unsupported at the breech.
A #5 contour all steel barrel seems to have about the same amount of flex at 30" at a carbon fiber barrel, even a 1.250" straight cylinder barrel.
Comparing a #7 or larger all steel barrel to the stiffness of a carbon fiber is not even a comparision, the all steel takes alot more pressure to get it to flex then the carbon barrels.
Now obviously, for the rounds I have chambered in these carbon fiber barrels, they are certainly stiff enough for fine accuracy but I am just curious about when you put the powder to them in a 338 Allen Magnum with a 300 gr SMK loaded to 3450 fps or even more of a strain when you drive a 350 gr ULD RBBT to 3250 fps.
We are playing with the idea of a 400 gr 338 bullet as well and this will add dramatically to the stress on these barrels. Will they take it?
Just wondering what velocity you are loading your personal rifles to and at what barrel length you have on your 338 Sniper Tac.
What gets me is the barrel cost, ****!!! They have to have twice the barrel life because they cost more then twice what an all steel barrel runs!!! /ubbthreads/images/graemlins/grin.gif /ubbthreads/images/graemlins/grin.gif
From the barrels I have chambered though, the ABS barrels appear to be the real deal. Everyone has been a shooter that I have fitted and for light weight they are nearly impossible to beat. I just wonder if there is a limit to the stress they will handle consistantly.
I know my barrel in the lathe experiment does not tell alot of scientific data but from what I see, as far as stiffness alone is concerned, an all steel barrel of a #7 or higher offers dramatically stiffer barrels then a carbon wrapped barrel.
Does this hurt accuracy, does not seem to so far, at least not in a 30" or shorter barrel in a round the class of a 338 RUM but we are talking alot more snort with our babies!! /ubbthreads/images/graemlins/grin.gif
Just curious what you have found.
Kirby Allen(50)