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
Adjusting Die to Chamber?
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="LRHWAL" data-source="post: 382012" data-attributes="member: 5418"><p>I'm going to maybe throw a curve ball and don't mean to confuse anyone (and don't claim to know everything, but don't tell my girlfriend I admitted that).</p><p></p><p>I'm with the guys who suggest that you need headspace gauges of some sort. Without them you don't really know where you are. In fact, sizing to "kiss" the shellholder with the bottom of the die without a "cam over" may be increasing the headspace of the case - i.e. moving the datum line forward. I've experienced this first hand. </p><p></p><p>Take a look as you size a case and you may see that initial "kiss" of the shellholder change to a gap of a few thou when you are actually performing a sizing operation and take up the play on the threads etc. As you start sizing you squeeze the body smaller and the brass needs to go somewhere, so it initially increases headspace and, as you adjust the die lower, it will begin to decrease the headspace again. It would have saved me some time if someone told me this before. This is nowehere in die instructions. I was setting up Redding Comp Shellholders and it was confusing to see the headspace initially increase as I used the shellholders that would in theory decrease it. </p><p></p><p>Your current setting may in fact be increasing the headspace. In most circumstances a hard up to the shellholder setting will size more than is needed and can increase the chances of head separations and the case wall thinning in the web area as described. It all depends on your chamber, brass, dies and shellholder.</p><p></p><p>So, I'm with measuring to know with certainty what I'm doing. Are my results better? I like to think so, or at least it's more likely that I'll be doing what I set out to and I'll know if things are not as I want them.</p><p></p><p>Redding describes the method of sizing for feel in their tech section onthe website. You could do that. I still prefer to measure.</p><p></p><p>I shoot a 300WM a great deal and I've not needed a Willis Collett sizer yet. I do use a Redding body die from time to time and that seems to get to the body as much as is needed.</p></blockquote><p></p>
[QUOTE="LRHWAL, post: 382012, member: 5418"] I'm going to maybe throw a curve ball and don't mean to confuse anyone (and don't claim to know everything, but don't tell my girlfriend I admitted that). I'm with the guys who suggest that you need headspace gauges of some sort. Without them you don't really know where you are. In fact, sizing to "kiss" the shellholder with the bottom of the die without a "cam over" may be increasing the headspace of the case - i.e. moving the datum line forward. I've experienced this first hand. Take a look as you size a case and you may see that initial "kiss" of the shellholder change to a gap of a few thou when you are actually performing a sizing operation and take up the play on the threads etc. As you start sizing you squeeze the body smaller and the brass needs to go somewhere, so it initially increases headspace and, as you adjust the die lower, it will begin to decrease the headspace again. It would have saved me some time if someone told me this before. This is nowehere in die instructions. I was setting up Redding Comp Shellholders and it was confusing to see the headspace initially increase as I used the shellholders that would in theory decrease it. Your current setting may in fact be increasing the headspace. In most circumstances a hard up to the shellholder setting will size more than is needed and can increase the chances of head separations and the case wall thinning in the web area as described. It all depends on your chamber, brass, dies and shellholder. So, I'm with measuring to know with certainty what I'm doing. Are my results better? I like to think so, or at least it's more likely that I'll be doing what I set out to and I'll know if things are not as I want them. Redding describes the method of sizing for feel in their tech section onthe website. You could do that. I still prefer to measure. I shoot a 300WM a great deal and I've not needed a Willis Collett sizer yet. I do use a Redding body die from time to time and that seems to get to the body as much as is needed. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
Adjusting Die to Chamber?
Top