bumping back

[rebs]

I necked sized some 223 brass and full length sized some for my Tikka T3x bolt gun. The accuracy was better with the neck sized brass as far as I could tell.

Can the Lee neck sizing die be used to bump the shoulder back ? If not then what is your procedure to bump and neck size ? Do you neck size first or bump first ? What dies do you use ?

 

[TrxR]

A lee collet die can not bump the shoulders back. You could keep using the lee collet neck die then use a Redding bodie die to bump the shoulder back. The other option is to use a good full length sizing die. Another option is the Forster bushing bump die which uses a bushing to size the neck and bumps tye shoulder but doesnt size the body.

You are going to have size the whole case sooner or later.

 

[Doom]

Do your neck sized rounds chamber easily? If they do assuming you have a commercial chamber and standard dies you should neck size only. You gain very little by trying to bump the shoulder back other than working the brass.

If you have a custom chamber and have a die made to FL size to your chamber then FL sizing may be of benefit. You will have marginally easier chambering.

 

[K22]

If you are properly full sizing your cases you should actually see an improvement in accuracy or at the very least no decline in accuracy with the added benefit of improved / consistent chambering / functionally.

Proper full sizing means setting the shoulder back about .001 to .002" (bolt rifles) from a fired case in the specific rifle you are loading for. There has been a numerous threads on this topic and the technology is well established that full sizing properly produces the most uniform reloads with enhanced functionally.

The benefits of neck sizing is a myth that has linger from the 60's.

 

[Liven The Dream]

I believe there is a Great Article on this Forum about Neck Sizing By Speedy ????

 

[rebs]

I believe there is a Great Article on this Forum about Neck Sizing By Speedy ????

tried searches and could not find it

 

[Liven The Dream]

tried searches and could not find it

It went along line of Not a good idea ? Neck Sizing !

Found it ? http://bulletin.accurateshooter.com/?s=Neck+Sizing&submit=Search

 

[BoydAllen]

There are some things that need to be made clear, up front, in any discussion of neck sizing vs. FL sizing. Not all neck sizing dies are created equal, neither are all FL dies, so one needs to specify the exact sort of die one is posting about.

As a general rule, the most accurate shooting is done with FL sized cases, BUT the dies used are not the usual off the shelf one piece variety, and the cases that are sized using them do not suffer from the flaws that are usually created by standard one piece dies.

Another issue that I commonly run into is that many shooters do not know how to properly set up a FL, body, or shoulder bump die. They follow the manufacturers' instructions which are very likely to cause shoulders to be pushed back too far, which will eventually lead to incipient separations, and if they are ignored actual case head separations.

If a poster expresses an opinion in this area, I think that it is only logical to ask him exactly what dies he is referring to, and in the case of dies that can bump shoulders, how he sets them up.

 

[JFrank]

(Edit to a family version )

there’s several threads on the search function

 

[Dusty Stevens]

Dogwhistle for guffey

 

[hpshooter]

"Apply the search function to reveal 4 pages of threads discussing the dreaded shoulder bump"

Eric Cortina had a good post on the advantages of proper full length sizing versus neck sizing.

 

[PatMiles]

Dogwhistle for guffey

 

[Iowa Fox]

The Lee collet die and the Redding body die are a perfect pair. I can't pickup any difference if I squeeze it in the collet first or bump the shoulder. If I had to say one thing, use John Valentines instructions for the collet die.