Originally Posted by Varmint Hunter
I have a new set of Redding type S dies for the .308. My intention was to push the shoulders of a fired case back about .001".
New Lapua cases measure 1.616" with the StoneyPoint headspace gauge.
Once fired cases measure about 1.618"
No matter how I adjust the die I can not push the shoulder back to 1.617", as I intended. If I lower the die enough the measurement actually gets longer. Cases actually grew to 1.6195".
OK - What is causing this problem?
I suppose you've screwed the die down onto the shellholder and it still won't bump the shoulder back .001"? If so, your problem is very common--even normal. Most dies will actually make the headspace longer right up until the point where they actually start to push the shoulder back. The reason is because the web is getting squeezed and the case is stretching upwards but the die is too long to actually bump the shoulder back. This is why I use headspace gauges everytime I set up my FL dies so I know exactly how much I need to adjust the dies.
If the die is too long, you have two choices. You can either have the bottom of the die cut off .010"-.015" or have your shellholder cut down the same measurement.
I have had about 25 dies cut off before I realized that it would be easier just to buy a whole new set of shell holders and just have them cut off instead. It is kinda spendy up front ($6.50 each) but it will pay off in the long run if you load lots of calibers.
My guess is that your die is just about to the point where it will start bumping the shoulder back but it just needs another .005" to make it work.