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
Ladder testing at 1k- Detailed article and video
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="Bart B" data-source="post: 359781" data-attributes="member: 5302"><p>Tony, I don't want bullets leaving the barrel such that their average barrel time puts them to when the barrel's at it high point in its whip cycle. Doing so means that those a little slower with longer barrel times and lower muzzle velocities will leave when the muzzle axis is on its down swing. The barreled action's fundamental whip frequency never changes but its amount does depending on recoil. The faster ones in this group will leave at a higher muzzle angle than the slower ones. And that's opposite of what's best for long range accuracy.</p><p></p><p>Bullets with lower muzzle velocity will strike lower on the target. If one wants the slower ones to strike in the middle of the group, they have to leave at a higher muzzle axis angle. Conversely, faster bullets should leave at slightly lower muzzle axis angles. This is the reason why British SMLE's in .303 and .308 Win. shoot so accurate at long range; slower bullets leave later in the barrel's whip cycle so they strike higher; faster ones leave sooner so they strike lower. It all averages out.</p><p></p><p>The only way to do this is to have all bullets leave on the barrel muzzle axis up swing. And this is what happens most of the time. Bullets are gone before the muzzle axis has gone from straight, then down a bit and finally upwards in its first 3 to 4 milliseconds of its 10 millisecond whip cycle. The bullet takes about 1.5 milliseconds to go from case to muzzle.</p></blockquote><p></p>
[QUOTE="Bart B, post: 359781, member: 5302"] Tony, I don't want bullets leaving the barrel such that their average barrel time puts them to when the barrel's at it high point in its whip cycle. Doing so means that those a little slower with longer barrel times and lower muzzle velocities will leave when the muzzle axis is on its down swing. The barreled action's fundamental whip frequency never changes but its amount does depending on recoil. The faster ones in this group will leave at a higher muzzle angle than the slower ones. And that's opposite of what's best for long range accuracy. Bullets with lower muzzle velocity will strike lower on the target. If one wants the slower ones to strike in the middle of the group, they have to leave at a higher muzzle axis angle. Conversely, faster bullets should leave at slightly lower muzzle axis angles. This is the reason why British SMLE's in .303 and .308 Win. shoot so accurate at long range; slower bullets leave later in the barrel's whip cycle so they strike higher; faster ones leave sooner so they strike lower. It all averages out. The only way to do this is to have all bullets leave on the barrel muzzle axis up swing. And this is what happens most of the time. Bullets are gone before the muzzle axis has gone from straight, then down a bit and finally upwards in its first 3 to 4 milliseconds of its 10 millisecond whip cycle. The bullet takes about 1.5 milliseconds to go from case to muzzle. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
Ladder testing at 1k- Detailed article and video
Top