I was reloading some once fired Peterson brass for my .280 AI this after noon and noticed that the shoulder after seating the bullet was almost flat....looked more like 70 degrees versus the normal 40 degrees....my question is could it have been caused by excessive bullet friction during the seating process? I was trying some older flat base Speer Grand Slams and noticed that they were abit difficult to get started into the neck. Also do you think it would be OK shoot it behind 59grains of Rx26? I only had one case do this and cannot figure any other way it could have happened.
Crushed shoulder
- Thread starter Cloudchaser
- Start date
Dusty Stevens
Shiner
You just about have to shoot it to get em formed back. Are your necks too thick for your seating die?
Measure neck as sized, and loaded.
Chamfer will fix unless there is a big difference in the measurements.
Chamfer will fix unless there is a big difference in the measurements.
My dies have worked fine with Nosler brass, they are RCBS and this is new Peterson brass. I fired about a doz. rounds working up loads using Rx26...I fired some with Hornady ELDx bullets and a few using the Speer....I usually chamfer the necks, but just did not think about it.
Them flat base bullets need a chamfer a whole lot more than boat tailed ones.
Frank
Frank
KMart
Gold $$ Contributor
One other thing. the RCBS seating die has a built in crimping feature. If you screwed down the seating die too far and the case length was a little long, you may have pushed the shoulder a little.
Back your seating die out about 1/2 turn and reset the lock ring, and readjust the seater plug for your seating depth.
Just one more thing to look at.
Back your seating die out about 1/2 turn and reset the lock ring, and readjust the seater plug for your seating depth.
Just one more thing to look at.
Thanks guys...I want to get a couple custom expander buttons, does RCBS offer them, or do I have to change to a Redding or some other custom die? Since these are mainly hunting, not bench rifles I am working with, did not see a need to spend couple hundred bucks for custom dies.
Dusty Stevens
Shiner
You can use a secondary expander mandrel. 21st century makes a nice one and any size is available
Thanks Dusty, I will look them up.
Dusty Stevens
Shiner
Expander Die Body
Expander Die Body Introducing the much anticipated Generation X Expander Die Body with viewing window! Set up of an expander die has not been easier! The viewing window allows the user to set the die to allow for optimal mandrel use without “bottoming out”. Machined out of 7075 Aluminum and...
Try the newest one with a window. Youll love it
Been reloading since 1970. Only once did I have a wrinkled shoulder. It was caused by a build up of case lube in the die. I really put a lot of lube on a couple cases. Now before each reload session I take the die apart and clean with carb cleaner spray and cotton swabs. Don't remember ever having high seating force. The most likely thing is the case neck I.D. not chamfered enough or not at all. In all my years of reloading I don't remember ever using increased force to seat bullets. When you place the bullet on the case make sure it's straight?
Upgrades & Donations
This Forum's expenses are primarily paid by member contributions. You can upgrade your Forum membership in seconds. Gold and Silver members get unlimited FREE classifieds for one year. Gold members can upload custom avatars.
Click Upgrade Membership Button ABOVE to get Gold or Silver Status.
You can also donate any amount, large or small, with the button below. Include your Forum Name in the PayPal Notes field.
To DONATE by CHECK, or make a recurring donation, CLICK HERE to learn how.
Click Upgrade Membership Button ABOVE to get Gold or Silver Status.
You can also donate any amount, large or small, with the button below. Include your Forum Name in the PayPal Notes field.
To DONATE by CHECK, or make a recurring donation, CLICK HERE to learn how.