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
Flatning Primers and Blowing out Primers
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="SBruce" data-source="post: 458657" data-attributes="member: 21068"><p>Question and Answer:</p><p> </p><p>Question; How many grains of Varget?</p><p> </p><p>CCI primers should be good.</p><p> </p><p>First fireing brass shouldn't have loose primer pockets. If you didn't ream them out and didn't deburr the flash holes excessively, then the brass is most likely good. One simple way to tell if the primers aren't deep enough is to just make sure they are below the case head when seated.</p><p> </p><p>Your Question: <em>If the chamber does have excessive head space how do I first of all verify that, and secondly what do I do to cope with or solve an excessive head space problem.</em> </p><p> </p><p>Answer: There are at least two ways to go about this. </p><p> </p><p>One, take it to a qualified smith and have them measure the headspace with go/no go gauges.</p><p>If they find excessive headspace, have them set the barrel back and fix it.</p><p> </p><p>Two, buy an RCBS Precision Mic for 22-250 (they're not expensive and easy to use/understand). Read the instructions and measure the headspace from a fired case. Compare this measurement to the chart that they provide. Next, measure the headspace from a FL sized and unfired case. The difference between the two measurments (fired vs FL sized/unfired) should only be a maximum of .003". If it's more than that, you're FL sizing too much and "compressing" the case too much. Even if the chamber isn't excessive, we can make it so by running the FL sizer in too deep over the case (bumping the shoulder back too far). </p><p> </p><p>The Precision Mic also has some other functions and I highly recommend it.</p><p> </p><p>We really only want to resize just enough that the case will chamber with a very very slight resistance. Any more than this is over doing it and can lead to primer flattening and even worse, case head separation!</p><p> </p><p>I once had a 220 Swift with excessive headspace. It wasn't over the SAAMI specs, but it was on the high end. I had some handloads with flattened primers so I backed the loads way down till they weren't flat anymore. Little did I know at the time, so I continued to FL size as per the die instructions (you know, screw the die all the way down till it touches the shellholder type of thing?) Well, long story short; I started getting cases that would separate just ahead of the web, even with the reduced loads. I then found the Precision Mic and Neck Size dies. I neck sized till I absolutely had to FL size, and then only enough to chamber easily again. </p><p> </p><p>In the end, I was able to bring the loads back up to where they should be and Wallaaa........no more flattened primers and no more head separation. I bought 500 cases and got about 6 to 8 reloads per case before I finally shot the barrel out of the gun. This little fiasco was about 20 years ago, I've been using the precision mic ever since on factory rifles.</p></blockquote><p></p>
[QUOTE="SBruce, post: 458657, member: 21068"] Question and Answer: Question; How many grains of Varget? CCI primers should be good. First fireing brass shouldn't have loose primer pockets. If you didn't ream them out and didn't deburr the flash holes excessively, then the brass is most likely good. One simple way to tell if the primers aren't deep enough is to just make sure they are below the case head when seated. Your Question: [I]If the chamber does have excessive head space how do I first of all verify that, and secondly what do I do to cope with or solve an excessive head space problem.[/I] Answer: There are at least two ways to go about this. One, take it to a qualified smith and have them measure the headspace with go/no go gauges. If they find excessive headspace, have them set the barrel back and fix it. Two, buy an RCBS Precision Mic for 22-250 (they're not expensive and easy to use/understand). Read the instructions and measure the headspace from a fired case. Compare this measurement to the chart that they provide. Next, measure the headspace from a FL sized and unfired case. The difference between the two measurments (fired vs FL sized/unfired) should only be a maximum of .003". If it's more than that, you're FL sizing too much and "compressing" the case too much. Even if the chamber isn't excessive, we can make it so by running the FL sizer in too deep over the case (bumping the shoulder back too far). The Precision Mic also has some other functions and I highly recommend it. We really only want to resize just enough that the case will chamber with a very very slight resistance. Any more than this is over doing it and can lead to primer flattening and even worse, case head separation! I once had a 220 Swift with excessive headspace. It wasn't over the SAAMI specs, but it was on the high end. I had some handloads with flattened primers so I backed the loads way down till they weren't flat anymore. Little did I know at the time, so I continued to FL size as per the die instructions (you know, screw the die all the way down till it touches the shellholder type of thing?) Well, long story short; I started getting cases that would separate just ahead of the web, even with the reduced loads. I then found the Precision Mic and Neck Size dies. I neck sized till I absolutely had to FL size, and then only enough to chamber easily again. In the end, I was able to bring the loads back up to where they should be and Wallaaa........no more flattened primers and no more head separation. I bought 500 cases and got about 6 to 8 reloads per case before I finally shot the barrel out of the gun. This little fiasco was about 20 years ago, I've been using the precision mic ever since on factory rifles. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
Flatning Primers and Blowing out Primers
Top