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
Hunting
Long Range Hunting & Shooting
280 AI FT +P vs 7mm PRC
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="Paladin300" data-source="post: 2789407" data-attributes="member: 115299"><p>A standard caliber will loose about 25 fps for every inch you cut off. Most velocities are for a 24" barrel. Magnum calibers can loose as much as 50 fps and data for most of them is for a 26" barrel. 308 is tricky because the data can be for a 20" or 24". Cans do not necessarily add velocity. It is not the same as barrel length. I made the mistake of suggesting that one time, that is in correct. You do get back pressure which adds between 35-65 fps in velocity, so technically if you cut a couple inches off the lost in velocity is negligible, which was my point back then. If you cut more than that though you really aren't gaining anything by shooting the 7PRC over the 280AI or 284. A 20" 7 mag for example may loose 200 fps the 284 100 fps they both get the advantage of back pressure but with it you are only gaining maybe 100 fps and using 25-30 percent more powder in the 7 mag. If I were building a short barreled rifle for use with a can I would go 284 or 280 AI. It is just more efficient.</p></blockquote><p></p>
[QUOTE="Paladin300, post: 2789407, member: 115299"] A standard caliber will loose about 25 fps for every inch you cut off. Most velocities are for a 24” barrel. Magnum calibers can loose as much as 50 fps and data for most of them is for a 26” barrel. 308 is tricky because the data can be for a 20” or 24”. Cans do not necessarily add velocity. It is not the same as barrel length. I made the mistake of suggesting that one time, that is in correct. You do get back pressure which adds between 35-65 fps in velocity, so technically if you cut a couple inches off the lost in velocity is negligible, which was my point back then. If you cut more than that though you really aren’t gaining anything by shooting the 7PRC over the 280AI or 284. A 20” 7 mag for example may loose 200 fps the 284 100 fps they both get the advantage of back pressure but with it you are only gaining maybe 100 fps and using 25-30 percent more powder in the 7 mag. If I were building a short barreled rifle for use with a can I would go 284 or 280 AI. It is just more efficient. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Hunting
Long Range Hunting & Shooting
280 AI FT +P vs 7mm PRC
Top