Forster Bump Die

[Skunce]

I'm considering buying a Forster Bump bushing die for the first time. My question is for those who have used them, will I need to buy a full length sizer also? I've used neck dies before and my cases would require full length sizing after a few firings to chamber easily. Also how would you rate this die compared to the Redding bushing FL die. They will be for a 204 Ruger.

 

[JoePellegrene]

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[1000yardstare]

The bump die is a full length sizer. It doesn`t touch the neck, the reverse of a neck die.

[NOTE: The Forster Precision Bump die is different -- it sizes neck and pushes shoulder back but does NOT resize the case body. See: https://secure.cazbah.net/client_images/catalog19938/pages/files/Bushing_Bump_Sizing_Die_DIE-0008.pdf]

The full length bushing die sizes the whole case, using the same bushings as the neck bushing die.

The bushings do not size the neck right to the shoulder but stop well short.

Typically for an new unfired case I size with a regular non-bushing neck die to round out and uniformly size the neck then use the neck bushing die on fireformed cases.

The bump die is used when the bolt starts to close hard but there is a current stream of thought that the shoulder should be bumped every loading,Tubb), especially in competition ammo, to maintain consistency from shot to shot.

 

[NorCalMikie]

I've got the Forster Precision Bushing Bump Die for my 6 BR. Rather than buy another die, I picked up a extra set of bushings and I can also do my 22 BR cases from the same die. After maybe 6-8 firings I'll run the brass through a Redding body die if the cases get snug in the chamber. With a pretty snug headspace, you won't have to bump the shoulder back every time. I go by bolt feel. If it closes pretty easy, you're good to go. YMMV.

 

[crashnrondo]

I was under the impression you can bump the shoulder back with these dies so you won't need another die. I have one coming for my 6mmBR and I hope that is the case.

 

[NorCalMikie]

Ron: You can bump the shoulders back if you want to. That's why there called a Precision 'Bump' die. Fire the round, measure the length of the case to see where it is, then bump the shoulder back maybe .001 or .002. The less you move the brass, the longer it lasts. Or if you think you don't need to bump, don't. If the shell fits back in the chamber after it's fired, adjust the die to not bump the shoulder. Just size the neck, load it back up and go shoot something. But somewhere down the line your brass will start getting tight in the chamber and you might have to body size. I've got brass that's been fired maybe 15 to 20 times and it's still going strong. No bump, just neck size and load.
The Forster is the only die I use on my 6 and 22 BR cases. :thumb:

 

[crashnrondo]

OK, I understand now, the die will bump the shoulder but its not touching/sizing the body. So I guess I will need another die sooner or later.
Thanks,
Ron