I don't like cutting down 2 3/4 hulls. As you can see in Drew's picture above there is quite a bit of the star crimp left on the hull. I suppose it may be okay if you are star crimping your 2.5 hulls but they don't form well with a roll crimp. I use 3" hulls for that reason and being I shoot a lot of migratory birds with a good crew I have lots to cut down. What I've done is make a jig out of a 2x4. I planed it to 2.5 inches then cut the appropriate sized holes for the hulls to fit through. Use a fine blade on a table saw and you can make as many as you like in one cut. My jig is good for 20 hulls. I also do the same for plastic wads since I only use the cup when reloading.
