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
Reloading
Why the big charge difference
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="kraky" data-source="post: 136102" data-attributes="member: 180"><p>Often the big manufacturers use minimum dimension high quality test barrels for their data developement and then put that info into a reloading manual. They may get those velocities but often we won't in the real world. I'd be really surprised if your 280 is a 26" barrel...I'm thinking 24" and maybe even 22".</p><p>I ran the 59 grain load (re19)past my quick load program and its guessing you would be doing about 3033fps at 62000psi. That would definately be a max load. And, your chrono is saying you are at that level. You could run there but might want to back off a tad to about 2950---especially if there is more accuracy there. It's also possible that your throat has some wear from that many shots that could slow down the bullet slightly. </p><p>I had a friend years ago that was telling me how his 7 mag was doing such and such a speed cause he read it in a manual. I took the chrono over to his house and he was terribly unhappy to see 150 fps slower. He went back into the house and came back out with some new shells 15 minutes later. His next round was within 50 fps of the manual but.....the funny thing was his bolt now wouldn't open!</p><p>It's good to get a couple load manuals and cross reference loads and projected veloicty. I find the hornady manual to be a bit more realistic than most.</p><p>Don't worry about trying to get book velocity.... if you get anywhere near with great accuracy you've done your job.</p></blockquote><p></p>
[QUOTE="kraky, post: 136102, member: 180"] Often the big manufacturers use minimum dimension high quality test barrels for their data developement and then put that info into a reloading manual. They may get those velocities but often we won't in the real world. I'd be really surprised if your 280 is a 26" barrel...I'm thinking 24" and maybe even 22". I ran the 59 grain load (re19)past my quick load program and its guessing you would be doing about 3033fps at 62000psi. That would definately be a max load. And, your chrono is saying you are at that level. You could run there but might want to back off a tad to about 2950---especially if there is more accuracy there. It's also possible that your throat has some wear from that many shots that could slow down the bullet slightly. I had a friend years ago that was telling me how his 7 mag was doing such and such a speed cause he read it in a manual. I took the chrono over to his house and he was terribly unhappy to see 150 fps slower. He went back into the house and came back out with some new shells 15 minutes later. His next round was within 50 fps of the manual but.....the funny thing was his bolt now wouldn't open! It's good to get a couple load manuals and cross reference loads and projected veloicty. I find the hornady manual to be a bit more realistic than most. Don't worry about trying to get book velocity.... if you get anywhere near with great accuracy you've done your job. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
Why the big charge difference
Top