Forums
New posts
Search forums
What's new
Articles
Latest reviews
Author list
Classifieds
Log in
Register
What's new
Search
Search
Search titles and first posts only
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Rifles, Reloading, Optics, Equipment
Gunsmithing
barrel diameters and muzzle brakes.
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="shortgrass" data-source="post: 953932" data-attributes="member: 24284"><p>You might calculate that a 30 cal muzzle with 20kpsi needs to have wall thickness of PA/2s = 20kpi [.3/2]^2/2[120k] = .006" thick walls. The peak of the threads helps. Hoop stress is twice longitudinal stress, so where it is threaded, it could be less than .006" thick walls.</p><p> </p><p></p><p>It was back in the 1990s that my father, the chief engineer gun designer and a mechanical engineering professor showed me how to calculate hoop stress [and shear stress and section modulus] so I could know how hot I could load a 45/70 handi rifle. I think my calculation shows up on the old usenet for rec.guns.</p></blockquote><p></p><p>Your concerns about your 45/70 cal. Handi-Rifle are completely misguided. That wouldn't be so much about the strength of the barrel, but the strength of the action and its method of locking into battery . It was designed for no more than SAAMI speced ammo. I've seen more than one Handi-Rifle locked-up (unable to open the action) after shooting hot hand loads. Heck, I've one or two that were locked-up (couldn't open the action) after shooting factory loaded ammo.</p><p>[/QUOTE]</p>
[QUOTE="shortgrass, post: 953932, member: 24284"] You might calculate that a 30 cal muzzle with 20kpsi needs to have wall thickness of PA/2s = 20kpi [.3/2]^2/2[120k] = .006" thick walls. The peak of the threads helps. Hoop stress is twice longitudinal stress, so where it is threaded, it could be less than .006" thick walls. It was back in the 1990s that my father, the chief engineer gun designer and a mechanical engineering professor showed me how to calculate hoop stress [and shear stress and section modulus] so I could know how hot I could load a 45/70 handi rifle. I think my calculation shows up on the old usenet for rec.guns.[/QUOTE] Your concerns about your 45/70 cal. Handi-Rifle are completely misguided. That wouldn't be so much about the strength of the barrel, but the strength of the action and its method of locking into battery . It was designed for no more than SAAMI speced ammo. I've seen more than one Handi-Rifle locked-up (unable to open the action) after shooting hot hand loads. Heck, I've one or two that were locked-up (couldn't open the action) after shooting factory loaded ammo. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Gunsmithing
barrel diameters and muzzle brakes.
Top