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
Finding Jam - I thought I knew how
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="rammac" data-source="post: 2071168" data-attributes="member: 27761"><p>Maybe somebody said something about ogive shape/taper but I didn't see it.</p><p></p><p>When you measure to the ogive you have to remember that the ogive is a taper (imagine cutting the bullet in half along it's length) and different brand bullets, regardless of weight or overall length, will have different tapers.</p><p></p><p>You measure to the ogive using a tool that has a hole equal to the diameter of the place on the bullet that you want to measure. If your bore is (at the top of the lands) is .30" then the place on the ogive that you want to measure is where the bullet's diameter is .30".</p><p></p><p>If the tool you are using to measure the base-to-ogive dimension has a hole that is the wrong size then you will not get a good number for your bullet seating depth. If your tool has a tapered hole it must be tapered correctly, too sharp of a taper and the tool will not touch at the proper ogive diameter.</p><p></p><p>Regardless of what method you use to find the cartridges overall length (COAL) you have to recognize that the length is only good for that bullet. Your numbers will vary if you change anything about the bullets; brand, weight, style, etc.. Even within the same brand and lot number you will have some variances but not enough to worry about.</p></blockquote><p></p>
[QUOTE="rammac, post: 2071168, member: 27761"] Maybe somebody said something about ogive shape/taper but I didn't see it. When you measure to the ogive you have to remember that the ogive is a taper (imagine cutting the bullet in half along it's length) and different brand bullets, regardless of weight or overall length, will have different tapers. You measure to the ogive using a tool that has a hole equal to the diameter of the place on the bullet that you want to measure. If your bore is (at the top of the lands) is .30" then the place on the ogive that you want to measure is where the bullet's diameter is .30". If the tool you are using to measure the base-to-ogive dimension has a hole that is the wrong size then you will not get a good number for your bullet seating depth. If your tool has a tapered hole it must be tapered correctly, too sharp of a taper and the tool will not touch at the proper ogive diameter. Regardless of what method you use to find the cartridges overall length (COAL) you have to recognize that the length is only good for that bullet. Your numbers will vary if you change anything about the bullets; brand, weight, style, etc.. Even within the same brand and lot number you will have some variances but not enough to worry about. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
Finding Jam - I thought I knew how
Top