I'm having issues reforming/decapping my 300 brass. RCBS manual "Ram all the way in upward position, screw in die till it's touching shell holder, screw in a 1/4 turn more in or out." This has worked with my 9 / 357 / 44 / .223 but for some reason the 300 would budge the case shoulder.
I uploaded both 556 and 300 to ensure I'm doing this correctly.
After a close inspection I noticed the lock ring was plugging the vent hole when adjusted properly. I screwed the die up 3 turns to reveal the hole that is now obviously way off but worked. My .223 die vent hole is placed a little higher which works as stated.
The crushed neck looks to me like the expander ball is too high and the neck opening is being jammed into the die. Lower the decapping rod and try again. Your picture shows the 300 BO primer was never punched out which leads me to the conclusion.
smustian wrote:The crushed neck looks to me like the expander ball is too high and the neck opening is being jammed into the die. Lower the decapping rod and try again. Your picture shows the 300 BO primer was never punched out which leads me to the conclusion.
Per RCBS manual the decapping rod should not protrude more than 3/16"
smustian wrote:The crushed neck looks to me like the expander ball is too high and the neck opening is being jammed into the die. Lower the decapping rod and try again. Your picture shows the 300 BO primer was never punched out which leads me to the conclusion.
Per RCBS manual the decapping rod should not protrude more than 3/16"
And your result with that information got you what? To prove it to yourself, remove the decapping rod and size a case. Let me know what your result is.
smustian wrote:The crushed neck looks to me like the expander ball is too high and the neck opening is being jammed into the die. Lower the decapping rod and try again. Your picture shows the 300 BO primer was never punched out which leads me to the conclusion.
Per RCBS manual the decapping rod should not protrude more than 3/16"
And your result with that information got you what? To prove it to yourself, remove the decapping rod and size a case. Let me know what your result is.
Already did and it didn't budge the case.
I'm not disagreeing with you but just trying to follow the manual.
Just measured the pin protrusion on my RCBS small base die. It extends 5/16" out of the bottom of the die. I have formed and or resized over 1000 cases and never had a problem. Try 5/16" protrusion.
smustian wrote:The crushed neck looks to me like the expander ball is too high and the neck opening is being jammed into the die. Lower the decapping rod and try again. Your picture shows the 300 BO primer was never punched out which leads me to the conclusion.
Per RCBS manual the decapping rod should not protrude more than 3/16"
I can't believe I read that. Haha I guess RCBS is the word of God and unless our advice fits that perfectly it is wrong. You didn't deprime the case. Your expander/decapping pin is not down far enough and it looks like it is pushing the neck down into the shoulder. Screw the decapper down until it decaps the primer.
This is why I uploaded both cases to show some clowns that I'm aware of what happened and made the adjustments needed. Now maybe you should go back and read what I said.
The vent hole located at the bottom of the die is confusing because the .223 die vent hole sits up top and doesn't interfere with this process. Not the end of the world, I can lower it, just trying to figure out why that's all. You figure they make manuals for a reason but some choose to toss them out
