Newbie reloading question

Discussion in 'Reloading' started by Rickyrebar, Feb 17, 2010.

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  1. Rickyrebar

    Rickyrebar Active Member

    Dec 12, 2009
    I am venturing into reloading and have a question regarding once fired case length for 300 WSM.
    The reloading manuals show the length of this case should be 2.100.
    I have checked 2 of my once fired brass & nickel cases and found them to be 2.098 (WIN,Nickel) & 2.099 (FC,Brass), this is before resizing.
    I am confused, I thought the cases were stretched when fired. What I am seeing is they either have shrunk or they were much shorter to start with.
    Is what I am seeing common, or an I screwed up?
  2. Winchester 69

    Winchester 69 Well-Known Member

    Mar 29, 2007
    Check it's length after it's been sized. That's what the chamber will see.
  3. bozo699

    bozo699 Active Member

    Feb 18, 2010

    I don't know what manual you are looking @ but max. case length is 2.100,your right there.Trim length is 2.090,like winchester 69 said resize it check it,but if I were you I would trim it and depending on condition of your chamber you will probably will get two or three more loadings before you will have to trim again. ask lots of questions if your unsure,read alot- once you pull the trigger thers no turning back! good luck.:)
  4. gunpower

    gunpower Well-Known Member

    Apr 10, 2009
    I have found that no matter what type of brass you buy (new) and one time fired, the brass is always under the book dimensions. It takes a couple of times of firing the cases to have them come up to the specs that are shown in the loading manules.