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
"Jamming" bullet into the lands?
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="Buffalobob" data-source="post: 446130" data-attributes="member: 8"><p>Yes you are wrong.</p><p></p><p>Jamming bullets is not hard to understand if you are willing to learn. A good learning exercise for you would be to measure the distance to the lands and then measure what jammed is and what jump is.</p><p></p><p>First point is that if you are going to jam bullets it is good to have a concentricity gauge and make sure that they are relatively straight to begin with. If you don't have such a gauge then you certainly have no business even talking about jamming bullets.</p><p></p><p>The neck tension on a properly handloaded long range bullet is not all that much. It is just enough that you cannot move the bullets with "moderate" finger force. If one were to really try hard then one can most of the time move a bullet deeper into the case with hand pressure. We anneal cases to try to keep that tension in a region that produces consistent and accurate neck tension. Certainly if one was to take a bullet and turn it upside down and place the point on a table and push on the rear of the cartridge one could move the bullet.</p><p></p><p>No then some simple metallurgy. The lands are a part of the barrel and the barrel is stainless steel. That stuff is real hard. The bullet jacket is copper or copper alloy and is deliberately soft so it can deform and mold to the shape of the barrel interior surface, but not so soft that it will not track the rifling. Whether you start the bullet into the lands slowly and easily with the camming of the bolt or violently with the ignition of the primer is the point under discussion. But unless you use magic pixie dust and can get the bullet out of the barrel without going down the barrel the soft copper is going to be engraved by the lands. Whether you do it slowly and easily or violently is up to you.</p><p></p><p>Now then some stray but important pieces of information. In addition to the cartridge having a bullet it also has some carbon based propellant. This propellant will accumulate in the barrel causing what is known as a carbon ring. This ring will progress both to the front and to the rear as it grows. Not jammed can become jammed if you don't pay attention to your rifle.</p></blockquote><p></p>
[QUOTE="Buffalobob, post: 446130, member: 8"] Yes you are wrong. Jamming bullets is not hard to understand if you are willing to learn. A good learning exercise for you would be to measure the distance to the lands and then measure what jammed is and what jump is. First point is that if you are going to jam bullets it is good to have a concentricity gauge and make sure that they are relatively straight to begin with. If you don't have such a gauge then you certainly have no business even talking about jamming bullets. The neck tension on a properly handloaded long range bullet is not all that much. It is just enough that you cannot move the bullets with "moderate" finger force. If one were to really try hard then one can most of the time move a bullet deeper into the case with hand pressure. We anneal cases to try to keep that tension in a region that produces consistent and accurate neck tension. Certainly if one was to take a bullet and turn it upside down and place the point on a table and push on the rear of the cartridge one could move the bullet. No then some simple metallurgy. The lands are a part of the barrel and the barrel is stainless steel. That stuff is real hard. The bullet jacket is copper or copper alloy and is deliberately soft so it can deform and mold to the shape of the barrel interior surface, but not so soft that it will not track the rifling. Whether you start the bullet into the lands slowly and easily with the camming of the bolt or violently with the ignition of the primer is the point under discussion. But unless you use magic pixie dust and can get the bullet out of the barrel without going down the barrel the soft copper is going to be engraved by the lands. Whether you do it slowly and easily or violently is up to you. Now then some stray but important pieces of information. In addition to the cartridge having a bullet it also has some carbon based propellant. This propellant will accumulate in the barrel causing what is known as a carbon ring. This ring will progress both to the front and to the rear as it grows. Not jammed can become jammed if you don't pay attention to your rifle. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
"Jamming" bullet into the lands?
Top