Over the last several months I have started to reload shells for my 300 WSM. Finding a good overall oad was quite a chore, but I now have a good and accurate load.
That said, it seems to me that when I use new casings, my groupings are better than those that have already been shot. Does any one else see this? I resize and reset casing OAL each time I reload them, but I do not resize the neck. Does anyone do this. Do you think this could be the difference in accuracy?
What do you use to resize the neck of a casing?
Thanks for the help.