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
Need help with shoulder bumping!
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="ultraedge" data-source="post: 1060240" data-attributes="member: 36257"><p>You need to use a bump gauge specific for the shoulder angle of the particular cartridge that you are resizing. You put them in a dial caliper and measure from the base of the cartridge to the datum line. Take a cartridge fired in your rifle, measure this length, then adjust your sizing die to move the shoulder back about .002 . If you use the cartridges in multiple rifles more shoulder bump may be required, even if they have been chambered with the same reamer, because of minute headspace differences. Also if the brass has not been annealed, you might have to leave the press ram at the top of the stroke for a longer time period to move the shoulder consistently on work hardened brass. Gary</p></blockquote><p></p>
[QUOTE="ultraedge, post: 1060240, member: 36257"] You need to use a bump gauge specific for the shoulder angle of the particular cartridge that you are resizing. You put them in a dial caliper and measure from the base of the cartridge to the datum line. Take a cartridge fired in your rifle, measure this length, then adjust your sizing die to move the shoulder back about .002 . If you use the cartridges in multiple rifles more shoulder bump may be required, even if they have been chambered with the same reamer, because of minute headspace differences. Also if the brass has not been annealed, you might have to leave the press ram at the top of the stroke for a longer time period to move the shoulder consistently on work hardened brass. Gary [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
Need help with shoulder bumping!
Top