Neck sizing vs bumping?

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japlume

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This might have been asked before but here I go.
Wondering what the difference is? I had a full length that now has a case stuck, I mean, stuck in it. So I ordered a foster neck bumping set after reading a bit a out how neck sizing is better for precision. I was wondering if the bumping is the same as sizing but with a finer tuning.
Thanks guys
 
The Forrester Bushing bump die allows you to select a bushing to control the neck tension more accurately as well as pushes the shoulder back to allow the cartridge to chamber easily. A full length die sizes the neck and case body back to SAAMI specs. A neck sizing die only sizes the neck and nothing else. Both the neck die and FL die will size the neck to a predetermined tension which may or may not suite your desired application. I have used all three setups with success but pretty much stick to a plain old FL sizing die now for the majority of my reloading but when precision is desired I use a my Forrester bump die for one cartridge and for another I use a redding body die and lee collet die to achieve uniform cases.
 
japlume said:
This might have been asked before but here I go.
Wondering what the difference is? I had a full length that now has a case stuck, I mean, stuck in it. So I ordered a foster neck bumping set after reading a bit a out how neck sizing is better for precision. I was wondering if the bumping is the same as sizing but with a finer tuning.
Thanks guys
Click to expand...

Honestly I suggest that you google the question and read about it, it's all written everywhere already. Not much to add I guess.
 
Remove the case that is stuck in your die. Google how.

Then, properly lube your cases (google), and just use an FL die to bump .002 (google) and you are good.

No need to over complicate the basics.
 
prarie_boy said:
The Forrester Bushing bump die allows you to select a bushing to control the neck tension more accurately as well as pushes the shoulder back to allow the cartridge to chamber easily. A full length die sizes the neck and case body back to SAAMI specs. A neck sizing die only sizes the neck and nothing else. Both the neck die and FL die will size the neck to a predetermined tension which may or may not suite your desired application. I have used all three setups with success but pretty much stick to a plain old FL sizing die now for the majority of my reloading but when precision is desired I use a my Forrester bump die for one cartridge and for another I use a redding body die and lee collet die to achieve uniform cases.
Click to expand...

This is best and simplest description I've seen yet.
 
well it depends how simple you want to keep it.
A fl bushing die is not "basic reloading". It requires same brand cases with the same neck thickness, etc etc.
 
I have been using Redding Type s dies and with once fired Lapua the full length die will get a little compression on the brass in the last 1/4 inch. Oddly though, the brass would not fit into the case gauge after sizing. I ran some brass through the neck die with a .336 bushing and did not use the full length die and the brass would fit perfectly into the case gauge. I didn't try to run the brass through the full die after neck sizing but wonder if there is a need to do so. The rounds chamber very nice and I don't see any tightness at all.

Is there merit in doing more than it appears is required to get the brass to fit the case gauge? If I need to bump the shoulder back the base would be raised out of the groove on the bottom. If I need to trim the neck it will stick out the top. Am I missing something?
 
Magoo22 said:
I have been using Redding Type s dies and with once fired Lapua the full length die will get a little compression on the brass in the last 1/4 inch. Oddly though, the brass would not fit into the case gauge after sizing. I ran some brass through the neck die with a .336 bushing and did not use the full length die and the brass would fit perfectly into the case gauge. I didn't try to run the brass through the full die after neck sizing but wonder if there is a need to do so. The rounds chamber very nice and I don't see any tightness at all.

Is there merit in doing more than it appears is required to get the brass to fit the case gauge? If I need to bump the shoulder back the base would be raised out of the groove on the bottom. If I need to trim the neck it will stick out the top. Am I missing something?
Click to expand...

With bushing dies the lower portion of the case neck is not sized and the case may not slide all the way into a case gauge. This is because if the case neck is turned you will end up with a donut so this section of the neck is not sized.

Neck Bushing Dies — The Goods and Bads
http://www.mssblog.com/2016/10/03/neck-bushing-dies-the-goods-and-bads/

Below the bushing is beveled and this portion of the neck is not sized and may bind in a case gauge.

076-73187.jpg
 
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