When full length sizing cases in non-carbide dies, it is necessary to properly lubricate the case and the inside of the case neck so that it will not get stuck during resizing into the steel die. With a properly lubed case, our Reloader Press or Breech Lock Hand Press will easily accomplish proper resizing of even the largest of magnum cases.
If you are resizing rifle or handgun cases in a steel die, you should lube every case. If you are sizing pistol cases in a Lee carbide die, lube every 25th case or so to make resizing easier.
Using some Lee resizing lubricant, spread a small amount around the case below the shoulder so that there is a thin film. With the small amount of film that remains on your finger, "scrape" some into the inside of the case neck. Even though it's only on one side of the inside case neck, resize the case. Additional cases that have had the same procedure ensures that the decapper / expander inside the sizing die is properly lubricated. This method is far easier and faster than using the many utensils meant to completely coat the inside of the case neck.
Although you are not required to lube cases for use in carbide dies, we have found that if you just briefly roll the cases around in a cloth that has a light amount of oil on it, the increased ease of case sizing is very noticeable.