it is worth it! i started reloading for my 243 in june and i have been loving it. i bought the lee challenger breech lock kit which has almost everything you need, other than that kit i'd recommend the sierra manual or something like it, digital caliper, a VLD deburr tool i have a lyman that works gr8. i have the hornady 2 die set: bullet seater die, and the sizing die taht does neck and shoulder, if you get this die set or one like it make sure to get the hornady one shot aerosol lube!!! but i ended up buying a lee collet neck sizer die after a couple months or so, and its awesome, i shoot a softer load and i can just neck size, dont have to worry about the shoulder. and shooting a more reduced load makes brass last lots longer, and i dont have to trim as often. what kind of .243 do you have? good luck!