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="barefooter56" data-source="post: 1060284" data-attributes="member: 85389"><p>trentk16,</p><p>Fired brass does not expand at the same rate. So try this. If you can , remove the firing pin assembly from your bolt and try to find a couple pieces of brass fired IN THAT RIFLE that when you close the bolt on them you get no resistance through the first 2/3rd s to 3/4 of the bolt throw with some closing resistance during the last 1/3 to 1/4 of the bolt closure. Measure these cases with your Hornady Bump Gauge system and note the length. Now we adjust the full length , body or bump die. There are couple ways we can do this by either adjusting the die in the threads of the press or using the Redding Competition shell holders. The first way is to adjust the die in the press using a standard shell holder to what the factory calls for then turning the die up about 1- 1 1/2 turns. Run the brass up into the die and remeasure. If the case is still the same OR GETS LONGER (due to the die sizing the case body and no contact of the die on the cartridge shoulder) adjust the die down a small amount, run the brass through the die and re-check length. Follow this procedure until you get the shoulder bump you want/need. General rule of thumb is .001-.002 for target, .002-.003 for hunting, .003-.005 for semi-auto, pump or lever action rifles. </p><p> With the REDDING Competition shell holders. Adjust the die in the press per the instructions using a STANDARD REDDING SHELL HOLDER. Starting with the .010 thick shell holder run the the pre-measured brass through the die and check shoulder bump. If none or not enough go to the .080 thick shell holder and so on until you get the shoulder bump you want/need. I do this after I have decapped all the brass using a dedicated de-capping die like the RCBS that ONLY DE-CAPS AND DOES NO SIZING. That way I don't have to worry about a high primer. To re-cap, use the rifles chamber as a gauge to find the cartridge (s) case to use to set up your dies. Measure these cases with your bump gauge tool so you have a NUMBER to refer too. Then do your die set up to get the shoulder bump you want. IF you cannot remove the firing pin assembly from the rifle take a few cartridge cases and fire and neck size them until they chamber hard then measure and start from there. Hope this helps get you going!</p></blockquote><p></p>
[QUOTE="barefooter56, post: 1060284, member: 85389"] trentk16, Fired brass does not expand at the same rate. So try this. If you can , remove the firing pin assembly from your bolt and try to find a couple pieces of brass fired IN THAT RIFLE that when you close the bolt on them you get no resistance through the first 2/3rd s to 3/4 of the bolt throw with some closing resistance during the last 1/3 to 1/4 of the bolt closure. Measure these cases with your Hornady Bump Gauge system and note the length. Now we adjust the full length , body or bump die. There are couple ways we can do this by either adjusting the die in the threads of the press or using the Redding Competition shell holders. The first way is to adjust the die in the press using a standard shell holder to what the factory calls for then turning the die up about 1- 1 1/2 turns. Run the brass up into the die and remeasure. If the case is still the same OR GETS LONGER (due to the die sizing the case body and no contact of the die on the cartridge shoulder) adjust the die down a small amount, run the brass through the die and re-check length. Follow this procedure until you get the shoulder bump you want/need. General rule of thumb is .001-.002 for target, .002-.003 for hunting, .003-.005 for semi-auto, pump or lever action rifles. With the REDDING Competition shell holders. Adjust the die in the press per the instructions using a STANDARD REDDING SHELL HOLDER. Starting with the .010 thick shell holder run the the pre-measured brass through the die and check shoulder bump. If none or not enough go to the .080 thick shell holder and so on until you get the shoulder bump you want/need. I do this after I have decapped all the brass using a dedicated de-capping die like the RCBS that ONLY DE-CAPS AND DOES NO SIZING. That way I don't have to worry about a high primer. To re-cap, use the rifles chamber as a gauge to find the cartridge (s) case to use to set up your dies. Measure these cases with your bump gauge tool so you have a NUMBER to refer too. Then do your die set up to get the shoulder bump you want. IF you cannot remove the firing pin assembly from the rifle take a few cartridge cases and fire and neck size them until they chamber hard then measure and start from there. Hope this helps get you going! [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
Need help with shoulder bumping!
Top