Read your instructions it sounds like you have the neck sizing bushing in and it may not accommodate what you want. The set states it does not come with any bushings so you might have to order the proper one. https://www.redding-reloading.com/online-catalog/118-type-s-bushing-dies Plus if the neck of your cartridge is longer than the bushing it won't resize the entire length of the neck. One more thing what machine are you using for reloading? For this instance I would be using a Rock chucker or similar