I'm having trouble understanding how there can be a crush fit after sizing when the fired case shouldn't be larger than the chamber to begin with.
I'm not being sarcastic here. I really want to learn. I can chamber a fired case in my rifle without much more effort than a factory round so I'm not understanding how you can adjust sizing dies going just by feel of chambering a round.
If you check, you'll never chamber a factory round that will not chamber easily, their all made the SAMMI spect's and chamber's are cut to the same speck's. When you fire one of those, the case will move forward slightly and then back to the bolt face. The case will cool enough to allow the fired case to be ejected. Most people load to those spec's weather they know it or not, that's what full length die's do! Other's neck size, even with FL dies by not squeezing the case down past the bottom of the neck. problem is that every few round's, the case will have expanded enough to not re-chamber again after it's loaded. People that do that simply FL size again and start over. Other's partial size, actually wrong thing to call it IF your sizing only enough to chamber a round even though you can feel the shoulder rubbing in the chamber with the bolt closing.
I do not care for the crush fit I partial re-size. I shoot a case a few time only sizing about two thirds wat down the neck, you can see the sizing die leaves marks where the case stopped with the ram all the way up. i do that until I can no longer get a fired case back into that chamber. From there I run the die all the way down to the shell holder and then back out about a half turn. Try the case and it will not chamber without rubbing at all, maybe won't chamber at all. The shoulder need's set back! Turn the die down 1/8th inch each time the case won't chamber without rubbing, it'll take a number of tries. What your doing is slowly setting the die to re-size for that chamber. I keep going down just a bit until I can feel no rub chambering the case.First one with no rub is where I stop. I do not want to be out hunting and find out that one round simply will not rub. Of course you can try them all before you go but you find one and you need to pull the bullet and dump the powder simply because you cannot re-size a loaded case!
Run the ram up to the die with a case in it and lock down the die right there. Leave it locked even when you take it out and that die will be set as long as the lock ring isn't move for that rifle. Each of my rifle's has it's own die set.
When you reach that point you will have bumped the shoulder just a bit. You'll also bump the entire case just a bit. You cannot bump the shoulder with out bumping the whole case!
Then, I am a guy that use's only one bullet shape and weight in a rifle. So to seat a bullet, I start with the bullet set to the junction of the neck and shoulder.
To se the seating die to seat the bullet just short of the lands, I use a dummy load. Seat a bullet maybe half way down the neck. Run it easily into your chamber. You probably won't be able to close the bolt. Take it out and look at the ogive of the bullet, you'll see mark's on it where the bullet touched the lands, that's the ogive of the bullet. clean the marks off with a small piece of 0000 steel woll and turn the die down maybe 1/4 inch and try again. Do that until there are no longer marks being left on the bullet by the rifling. Then run that round back in with out moving the seating spindle and lock it down there. That seating depth will work to keep the bullet off the lands no matter which bullet you fire. Reason is that the distance from the bolt face to the land's will never change regardless of the bullet used. anf the dia of every bullet that dia will be the same at that point no matter which bullet is used.Keep in mind that when bullet's are made, the placement of the ogive changes just a bit but the dia at the ogive never change's.
