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
OBT method, barrel length vs velocity
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="Stammster" data-source="post: 1997653" data-attributes="member: 114381"><p>Ok, so I think we are thinking on the same page.</p><p></p><p>Let me tell you where I started, and why the interest. And then where I'm possibly going.</p><p></p><p>1.). When developing loads for the same gun but with different powders and bullets, I often found accuracy around the same velocity.</p><p>2.). When developing loads for several guns of the same caliber, with different barrel lengths, I found accuracy at the same general velocity, albeit charge weight varied. Depending on bullet weight and barrel length, I could often stay in the same node / velocity, but other times I could not.</p><p></p><p>The above was observed loading 270 Win, but I also load for 30-06 and 25-06. I haven't analyzed any of that data yet.</p><p></p><p>Wouldn't it be nice if it all boiled down to something like...Aim for these velocities xxxx, yyyy, or zzzz fps during load development. Independent of barrel length, powder, bullet, or possibly even caliber. - Rather than the OBT time / velocity / QL simulation "dance". </p><p></p><p>Perhaps wishful thinking, as I've only played around nodes # 3-5 and 20-24" barrel lengths - but I suspect that covers 90% of all bolt action hunting sportster rifles.</p><p></p><p>As mentioned, maybe the factory ammo manufactures already know this.</p></blockquote><p></p>
[QUOTE="Stammster, post: 1997653, member: 114381"] Ok, so I think we are thinking on the same page. Let me tell you where I started, and why the interest. And then where I’m possibly going. 1.). When developing loads for the same gun but with different powders and bullets, I often found accuracy around the same velocity. 2.). When developing loads for several guns of the same caliber, with different barrel lengths, I found accuracy at the same general velocity, albeit charge weight varied. Depending on bullet weight and barrel length, I could often stay in the same node / velocity, but other times I could not. The above was observed loading 270 Win, but I also load for 30-06 and 25-06. I haven’t analyzed any of that data yet. Wouldn’t it be nice if it all boiled down to something like...Aim for these velocities xxxx, yyyy, or zzzz fps during load development. Independent of barrel length, powder, bullet, or possibly even caliber. - Rather than the OBT time / velocity / QL simulation “dance”. Perhaps wishful thinking, as I’ve only played around nodes # 3-5 and 20-24” barrel lengths - but I suspect that covers 90% of all bolt action hunting sportster rifles. As mentioned, maybe the factory ammo manufactures already know this. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
OBT method, barrel length vs velocity
Top