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
Hoover Meplat Timmer and Pointing Die System .338 Lapua
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: 798235" data-attributes="member: 5302"><p>The way a friend did it back in 1970 used simple tools, but well made ones.</p><p></p><p>First, a collet was made to hold the bullets point down into it. It was precision machined so the wall thickness around the hole in it was very uniform in thickness and shape. It had a shaft that fit a Dremel Moto Tool chuck.</p><p></p><p>Then an amp meter was connected to the Moto Tool's power cord and measured the current drawn when it was spinning at 30,000 rpm without a bullet in it. With a bullet in it, the current was a bit more.</p><p></p><p>The more bullets were out of balance, their centrufigual forces put more load on the tool's bearings and more current was drawn to keep it up to speed. Bullets needing minimum current were considered to be "perfectly balanced" and were set aside. The more unbalanced ones indicated by more current needed were segregated into groups and set aside. A few of the several hundred bullets spun were so much out of balance they flew out of the collet and bounced off the walls and ceiling of the room the tests were done in.</p></blockquote><p></p>
[QUOTE="Bart B, post: 798235, member: 5302"] The way a friend did it back in 1970 used simple tools, but well made ones. First, a collet was made to hold the bullets point down into it. It was precision machined so the wall thickness around the hole in it was very uniform in thickness and shape. It had a shaft that fit a Dremel Moto Tool chuck. Then an amp meter was connected to the Moto Tool's power cord and measured the current drawn when it was spinning at 30,000 rpm without a bullet in it. With a bullet in it, the current was a bit more. The more bullets were out of balance, their centrufigual forces put more load on the tool's bearings and more current was drawn to keep it up to speed. Bullets needing minimum current were considered to be "perfectly balanced" and were set aside. The more unbalanced ones indicated by more current needed were segregated into groups and set aside. A few of the several hundred bullets spun were so much out of balance they flew out of the collet and bounced off the walls and ceiling of the room the tests were done in. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
Hoover Meplat Timmer and Pointing Die System .338 Lapua
Top