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
Is it possible that the ogive could vary .030" on different lots of Bergers?
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="Mikecr" data-source="post: 432743" data-attributes="member: 1521"><p>If you really wanna sneak up on a particular datum, you could drop in Redding/Wilson bushings into your Stoney/Hornady comparator:</p><p><img src="http://img217.imageshack.us/img217/2448/stoneybush.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p>I suspect you'll find that chosen datums relate to best overall consistency in measurement -given both tangent and secant ogives. There are compromises with everything.</p><p>I've tried em all, and vote Sinclair's 'nut' as one of the handiest tools in my box. Works as good as any.</p><p></p><p>There are only 3 things that matter toward actual seating from the lands:</p><p>1. Your maxOAL(not COAL, ref#3) is well determined.</p><p>2. The ogive is a qualified radius.</p><p>3. The same nose datum(at any point) is always used as your seating reference, w/resp to maxOAL.</p><p></p><p>50 reloaders here take 300 different approaches toward this end. Here's mine: </p><p>For #1, I use a rod down the muzzle stopped at the boltface, and then stopped at the tip of a reference bullet pressed against the lands. I'll seat this bullet for a matching COAL, and measure maxOAL with my NUT. LOG IT.</p><p>I have a nice stainless rod/stops made just for this(forget who makes), but a cleaning rod w/good stops would work fine I'm sure.</p><p></p><p>Few anywhere address #2.</p><p>Bullets vary in ogive radius, and nose/bearing lengths are not really an indicator of this. Radius can easily vary independent of nose, or bearing lengths, and it's a factor that affects these datums for sure.</p><p>I use ogive comparators offered by Bob Green to qualify them.</p><p><a href="http://greensrifles.com/New_Products.html" target="_blank">Bob Green New Products</a></p><p>I used to do it manually, you could by swapping bushings in your comparators, but it's a PITA.</p><p>Bob's tool compares two different datums on a bullet nose -at the same time, for a relative comparison of radius(radius variance). CULL BULLETS.</p><p></p><p>For #3, pick a tool your good with, and ALWAYS use it.</p><p>Like said I use this: <a href="http://www.sinclairintl.com/.aspx/pid=34262/Product/Sinclair_Hex_Style_Bullet_Comparators" target="_blank">SINCLAIR INTERNATIONAL : Sinclair Hex Style Bullet Comparators -</a></p></blockquote><p></p>
[QUOTE="Mikecr, post: 432743, member: 1521"] If you really wanna sneak up on a particular datum, you could drop in Redding/Wilson bushings into your Stoney/Hornady comparator: [IMG]http://img217.imageshack.us/img217/2448/stoneybush.jpg[/IMG] I suspect you'll find that chosen datums relate to best overall consistency in measurement -given both tangent and secant ogives. There are compromises with everything. I've tried em all, and vote Sinclair's 'nut' as one of the handiest tools in my box. Works as good as any. There are only 3 things that matter toward actual seating from the lands: 1. Your maxOAL(not COAL, ref#3) is well determined. 2. The ogive is a qualified radius. 3. The same nose datum(at any point) is always used as your seating reference, w/resp to maxOAL. 50 reloaders here take 300 different approaches toward this end. Here's mine: For #1, I use a rod down the muzzle stopped at the boltface, and then stopped at the tip of a reference bullet pressed against the lands. I'll seat this bullet for a matching COAL, and measure maxOAL with my NUT. LOG IT. I have a nice stainless rod/stops made just for this(forget who makes), but a cleaning rod w/good stops would work fine I'm sure. Few anywhere address #2. Bullets vary in ogive radius, and nose/bearing lengths are not really an indicator of this. Radius can easily vary independent of nose, or bearing lengths, and it's a factor that affects these datums for sure. I use ogive comparators offered by Bob Green to qualify them. [url=http://greensrifles.com/New_Products.html]Bob Green New Products[/url] I used to do it manually, you could by swapping bushings in your comparators, but it's a PITA. Bob's tool compares two different datums on a bullet nose -at the same time, for a relative comparison of radius(radius variance). CULL BULLETS. For #3, pick a tool your good with, and ALWAYS use it. Like said I use this: [url=http://www.sinclairintl.com/.aspx/pid=34262/Product/Sinclair_Hex_Style_Bullet_Comparators]SINCLAIR INTERNATIONAL : Sinclair Hex Style Bullet Comparators -[/url] [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
Is it possible that the ogive could vary .030" on different lots of Bergers?
Top