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
Rifles, Bullets, Barrels & Ballistics
7mm-08 vs .308win / Same 150gn bullet weight / Different Velocities?
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="entoptics" data-source="post: 1637516" data-attributes="member: 104268"><p>Though your question was answered for the most part, I figured I'd add a little math for a little more thorough explanation<span style="font-size: 14px">...</span></p><p></p><p>Area = πr^2</p><p></p><p>So, for the base of the bullet, being acted upon by 60,000 pounds per square inch...</p><p></p><p>π x (0.284/2)^2 = 0.0633 square inches x 60,000 lb/in2 = 3801 lbs</p><p>π x (0.308/2)^2 = 0.0745 square inches x 60,000 lb/in2 = 4470 lbs</p><p></p><p>So, even if you ignore differences in bearing surface friction, there's ~18% more force being applied to the bottom of a 308 bullet at the same pressure.</p></blockquote><p></p>
[QUOTE="entoptics, post: 1637516, member: 104268"] Though your question was answered for the most part, I figured I'd add a little math for a little more thorough explanation[SIZE=14px]...[/SIZE] Area = πr^2 So, for the base of the bullet, being acted upon by 60,000 pounds per square inch... π x (0.284/2)^2 = 0.0633 square inches x 60,000 lb/in2 = 3801 lbs π x (0.308/2)^2 = 0.0745 square inches x 60,000 lb/in2 = 4470 lbs So, even if you ignore differences in bearing surface friction, there's ~18% more force being applied to the bottom of a 308 bullet at the same pressure. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
7mm-08 vs .308win / Same 150gn bullet weight / Different Velocities?
Top