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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Magnetospeed Error Correction
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<blockquote data-quote="Trickymissfit" data-source="post: 928238" data-attributes="member: 25383"><p>actually there's a lot more to it than that. I used to have access to a mechanical CAD system that would read out in 1/10,000 of a second or less (think it went down to much less than that). It's mostly used to find stresses and reactive movement in a mechanical device. I drew up several different rifles with it to see what was going on when you pulled the trigger. I kind of used 60K psi as a standard pressure, as I didn't want to take the time to plug in several others. Not only did I see every action bend and torque, but saw barrels doing the same thing. Not only does the barrel try to unwind as the bullet is traveling, but it also stretches a little bit. Then it comes back because the steel was not taxed beyond it's yield point. The chamber also grows in every direction (more than most would think) I think there were nine vectors of force (counting reactive forces), and that didn't add in things like recoil lugs and movement of the stock. Short heavy barrels moved far less than the typical varmint profile (some moved as much as .10" at the muzzle). Fast twist barrels really are fun to watch a bullet go thru. They're like a coiled spring unwinding.</p><p>gary</p></blockquote><p></p>
[QUOTE="Trickymissfit, post: 928238, member: 25383"] actually there's a lot more to it than that. I used to have access to a mechanical CAD system that would read out in 1/10,000 of a second or less (think it went down to much less than that). It's mostly used to find stresses and reactive movement in a mechanical device. I drew up several different rifles with it to see what was going on when you pulled the trigger. I kind of used 60K psi as a standard pressure, as I didn't want to take the time to plug in several others. Not only did I see every action bend and torque, but saw barrels doing the same thing. Not only does the barrel try to unwind as the bullet is traveling, but it also stretches a little bit. Then it comes back because the steel was not taxed beyond it's yield point. The chamber also grows in every direction (more than most would think) I think there were nine vectors of force (counting reactive forces), and that didn't add in things like recoil lugs and movement of the stock. Short heavy barrels moved far less than the typical varmint profile (some moved as much as .10" at the muzzle). Fast twist barrels really are fun to watch a bullet go thru. They're like a coiled spring unwinding. gary [/QUOTE]
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