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
Galling Wilson expanding mandrel
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: 2571191" data-attributes="member: 1521"><p>It isn't about setting a particular interference, as that can just be set with a bushing. And it isn't because I like adding steps to reloading <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p></p><p>I was THE guy who began mandrel pre-seating ~20yrs ago, and it spread onward to the crazy today.</p><p>What I was doing is fixing the problem that was pulling necks off center, contributing to RUNOUT. </p><p>I could just remove buttons, or turn them down a bit, adjust bushings, but I noticed that I could still have significant runout with that. I also noticed over time that bullet grip (neck tension) was decreasing. That if I neck sized down, with no followup expansion, necks would continue springing back outward over time. The load results would change with that. So enough expansion was needed to cause yielding(sizing), to bias spring back inward instead of outward. But that's all, just that little bit.</p><p></p><p>The runout with down sizing only of necks was due to pushing thickness variance into interference with seating bullets. I took care of this anyway with neck turning, and part of turning is mandrel expansion for fitting to a turning mandrel, and I noticed the quality of that expansion method was very good (better than button type). I could push thickness variance outward without affecting neck center.</p><p>The K&M Expandiron was fine for neck turning but too big for reloading/bullet preseating. Sinclair's mandrels were the right size, so that's what I went with. I brought this to all shooting forums of the day. Today there are all kinds of mandrel choices (that's good),, but for the wrong reason..</p><p>We don't need mandrels to set TENSION. They're not needed for that, and bushing folks know they can set tension without mandrels.</p><p>It's my contention that mandrels and expansion in general were never about that, but they're still needed.</p><p>There is an important matter and other great potentials with mandrel use, but that should be another thread.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 2571191, member: 1521"] It isn't about setting a particular interference, as that can just be set with a bushing. And it isn't because I like adding steps to reloading :) I was THE guy who began mandrel pre-seating ~20yrs ago, and it spread onward to the crazy today. What I was doing is fixing the problem that was pulling necks off center, contributing to RUNOUT. I could just remove buttons, or turn them down a bit, adjust bushings, but I noticed that I could still have significant runout with that. I also noticed over time that bullet grip (neck tension) was decreasing. That if I neck sized down, with no followup expansion, necks would continue springing back outward over time. The load results would change with that. So enough expansion was needed to cause yielding(sizing), to bias spring back inward instead of outward. But that's all, just that little bit. The runout with down sizing only of necks was due to pushing thickness variance into interference with seating bullets. I took care of this anyway with neck turning, and part of turning is mandrel expansion for fitting to a turning mandrel, and I noticed the quality of that expansion method was very good (better than button type). I could push thickness variance outward without affecting neck center. The K&M Expandiron was fine for neck turning but too big for reloading/bullet preseating. Sinclair's mandrels were the right size, so that's what I went with. I brought this to all shooting forums of the day. Today there are all kinds of mandrel choices (that's good),, but for the wrong reason.. We don't need mandrels to set TENSION. They're not needed for that, and bushing folks know they can set tension without mandrels. It's my contention that mandrels and expansion in general were never about that, but they're still needed. There is an important matter and other great potentials with mandrel use, but that should be another thread. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
Galling Wilson expanding mandrel
Top