Blue soft performs ballistically for anything, and works in any sizer with the widest temperature extreem, without a heater. You don't box your bullets, but you can with blue soft, or carry a lubed bullet in your pocket for weeks and have the lube stay intact, though it will pick up lint and dirt from your pocket.
All lube sticks labeled 1X4, from all manufactures are quite close to those dimensions, which is mandatory to get them into all brands of sizers which are standardized. So the hollow sticks will give you about 10% less lube. Also, because the sticks have to be a little smaller than the lubrisizer lube chamber so they can be slipped in, there will be a little gap around. If economy is important, and if you want to put the maximum amount of lube into your sizer, to save the time and mess of unscrewing the pressure screw etc. Purchase solid sticks, melt them on an automatic coffee maker hot plate, which has the tempature controled to just under boiling, which means it cannot overheat the lube smoke or fire. Pour in the maximum amount allowable, put the pistion in and go to sizing. You'll never know it is filled with melted lube. It will flow like you inserted a solid stick.