FL sizing and neck sizing

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chevy bob

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Am first time reloading for my 8x57 Mauser and was told to neck size the brass instead of full length resizing.Can anyone tell me why you neck size for bolt actions and full length size for semi-autos?I guess its supposed to extend the life of the brass also.I have FL sized about 20 rounds and shot them in this rifle with no problem and just wondered about the neck sizing.I'm fairly new to reloading for bolt guns so any help would be appreciated.Thanks in advance.
 
To make you buy another die you don't have.

If you have 8x57 FL sizing dies, FL size.
Set the die so you have slight resistance when closing the bolt and you will have zero headspace, and just as much case life as if you neck-sized.

You will not be able to tell any differance in accuracy with open sights on a 98 Mauser.
And they will for sure all Feed, Fire, and Function Freely.

rc
 
+1 with rcmodel. Eventually you will need to set the shoulder back, which a N/S die cannot do.
 
Chevy Bob, conditioning, they say you need a neck sizer because the are condition to say "You gotta have a neck sizer", there is an element on reloading forms that think the natural path to reloading is 'SKIP THE ESSENTIAL ELEMENTS OF RELOADING' reloading has two essential elements, one the die and shell holder, the other is the chamber.

Accuracy and brass longevity,yea,that is the first thing a reloader aspires to accomplish??? The reloaders first objective to learn and understand what they are doing, I have neck sizer dies, I have small base dies, I do plan to use both one day but first I plan on running out of things I can do with the vestal full length sizer die. With the Versatile full length sizer die I forms cases for short chamber, .012 thousands shorter than a minimum length case to field reject length in thousands, and that is without accidentally bumping, there is nothing I do that is an accident when sizing I place the shoulder exactly where I want it.

F. Guffey
 
I use the NS dies both because I'm lazy & cheap. Not actually lazy I just don't like to make work for myself I don't need to do. I don't like to lube cases. I also don't like to spend money that I don't get a good return for. I like to extend brass life as much as possible. I would like to know where the eventually mark is for having to push the shoulder back. I have lost count but I know I have over 20 loadings on most of my cases without touching the shoulder. Maybe it has something to do with running the pressure to high. Maybe I'll find it around 100 loading if the case last that long.

For auto loader they say you have to FL to get them to chamber which I have never tried NS for a auto but the advice sounds sound to me.

What I have tried was take a NS case from my Savage & fired them through my new AR. Most chambered without a problem but about 5 out of about 40 were a real pain & to get the bolt back open(block of wood & a hammer).
 
What RC said. The FL die is always a necessary die for bottle neck cartridges, regardless if you neck size or not. Once you've determined the correct adjustment for your FL die, use the lock ring nut so you won't have to go through the entire process everytime you sit down to resize.
 
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It's possible to squeeze a little extra accuracy from a "target" rifle if you neck size only because the brass is already fire-formed in your rifle. But,,,, as rcmodel said, "You will not be able to tell any difference in accuracy with open sights on a 98 Mauser."
 
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