851c,
While it is easy to confuse the two, Keith's "fix" is likely correct with one small exception (from me). Neck sizing is performed with a die that is dimensioned to only size the neck area and not the body. Partial sizing is often confused with neck sizing, indeed many of us often speak of partial sizing as if it is neck sizing. I habitually partially size most of my handloads, especially those in rimmed or belted cases. This is performed with full length sizing dies, adjusted so as to fully resize the neck only and not set the shoulder back. In this process the shoulder's diameter is slightly reduced, while not measurably setting it back. The purpose of this is to prevent or significantly reduce case loss by head separation through stretching (note: improperly adjusting many neck sizing dies can also result in setting the neck back). In opposition to the advice to always full length resize cases for dangerous game hunting, test chambering all cartridges intended for hunting dangerous game (whether factory, handloaded in new cases, or handloaded in fired cases) will avoid chambering issues.
It might benefit the discussion to describe how partial sizing is accomplished. One method is to smoke (or mark with felt tip pen) the neck and shoulder of a case that was fired in the rifle and slowly adjust the die downward until the neck is fully sized and the shoulder is just "kissed" (smoke barely touched).The smoke on the body/shoulder will usually be removed, indicating a reduction of diameter, there.
If this is confusing, I apologize in advance.
Mike
