does any one here have hands on experience with the teludyne barrel sleeving process and it's efficacy?
teludyne
- Thread starter mosin46
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Re: teludyne
This has been beat to death in earlier threads. Start here:
http://www.snipershide.com/forum/ubbthreads.php?ubb=showflat&Number=2268753
Here's my personal opinion, reposted from the above linked thread:
The videos on the website were taken at a local gunclub, and I've seen these guys shoot a few benches down. I typically keep to myself at the range, and just didn't feel like talking that day, but they seemed like a decent bunch of guys. The range itself is outdoors and 300yds max.
The owner loses me in the video that shows a 20rnd rapid-fire string, where he grabs the barrel afterward to show how well it dissipates heat. This makes no sense to my engineering mind, as the heat has to go somewhere (1st Law of Thermodynamics). e.g. the medium between the barrel and shroud either conducts heat, or acts as an insulator.
In the former case, I would suggest nothing is stiffer and more heat conductive than solid steel, so the only benefit is weight reduction. In the latter, putting insulation between the barrel and shroud would make the barrel hotter, defeating the purpose altogether. In either case, I don't understand how this helps hunters (his targeted demographic), as follow-up shots aren't taken unless you're putting down a group of hogs.
In regards to rigidity, I'll just copy and paste a few excepts from their website, which make no sense to me, especially the part about 10" groups. Maybe I'm missing something:
There is a thing called "work hardening", this is when metal is repeatedly hammered or rubbed with pressure, it causes a hardening of the surface and is likely to begin to crack or break and without sufficient flexible backing it will simply break away. The fact that a rifle bore is an internal round structure makes this problem very unlikely in rifles. The heat we are talking about is leaving the barrel in a very "rubbery" state, so accuracy suffers and gets worse with use.
In lighter weight barrels another effect of increasing heat is present, it is called axial twist, when the bullet is fired at say, 2800 fps it accelerates from zero to 2000 miles per hour in the length of your barrel. This is done with almost no "slipping" in the rifling. The barrel has to keep the bullet contained in the track of the rifling to impart the spin on the bullet as it leaves the rifle. This is a tremendous force and it actually tries to "straighten-out" the barrel as it comes out. The barrel resists this very well, but as the heat rises it does it differently every shot, so a slightly different RPM can be imparted on every bullet. Combine this with the muzzle of the barrel being in a different location every shot due to harmonics and your shooting 10 inch groups.
This has been beat to death in earlier threads. Start here:
http://www.snipershide.com/forum/ubbthreads.php?ubb=showflat&Number=2268753
Here's my personal opinion, reposted from the above linked thread:
The videos on the website were taken at a local gunclub, and I've seen these guys shoot a few benches down. I typically keep to myself at the range, and just didn't feel like talking that day, but they seemed like a decent bunch of guys. The range itself is outdoors and 300yds max.
The owner loses me in the video that shows a 20rnd rapid-fire string, where he grabs the barrel afterward to show how well it dissipates heat. This makes no sense to my engineering mind, as the heat has to go somewhere (1st Law of Thermodynamics). e.g. the medium between the barrel and shroud either conducts heat, or acts as an insulator.
In the former case, I would suggest nothing is stiffer and more heat conductive than solid steel, so the only benefit is weight reduction. In the latter, putting insulation between the barrel and shroud would make the barrel hotter, defeating the purpose altogether. In either case, I don't understand how this helps hunters (his targeted demographic), as follow-up shots aren't taken unless you're putting down a group of hogs.
In regards to rigidity, I'll just copy and paste a few excepts from their website, which make no sense to me, especially the part about 10" groups. Maybe I'm missing something:
There is a thing called "work hardening", this is when metal is repeatedly hammered or rubbed with pressure, it causes a hardening of the surface and is likely to begin to crack or break and without sufficient flexible backing it will simply break away. The fact that a rifle bore is an internal round structure makes this problem very unlikely in rifles. The heat we are talking about is leaving the barrel in a very "rubbery" state, so accuracy suffers and gets worse with use.
In lighter weight barrels another effect of increasing heat is present, it is called axial twist, when the bullet is fired at say, 2800 fps it accelerates from zero to 2000 miles per hour in the length of your barrel. This is done with almost no "slipping" in the rifling. The barrel has to keep the bullet contained in the track of the rifling to impart the spin on the bullet as it leaves the rifle. This is a tremendous force and it actually tries to "straighten-out" the barrel as it comes out. The barrel resists this very well, but as the heat rises it does it differently every shot, so a slightly different RPM can be imparted on every bullet. Combine this with the muzzle of the barrel being in a different location every shot due to harmonics and your shooting 10 inch groups.
Re: teludyne
I watched one melt down via a full auto M16 lower....was spewing the goop all out the front and through the chamber.
I watched one melt down via a full auto M16 lower....was spewing the goop all out the front and through the chamber.
Re: teludyne
I didn't realize the guys making that are the ones I've seen before. They are right up the road from me and I'be seen the rifles but didn't get to stick around long enough to see one shot. I don't see any reason to spend extra money improving on a rifle that can already shoot great. Now if you filled the barrel shroud type thing with silver solder os something comparable that transfers heat very well, then maybe.
I didn't realize the guys making that are the ones I've seen before. They are right up the road from me and I'be seen the rifles but didn't get to stick around long enough to see one shot. I don't see any reason to spend extra money improving on a rifle that can already shoot great. Now if you filled the barrel shroud type thing with silver solder os something comparable that transfers heat very well, then maybe.
