+1 on the above.
Proper case prep such as trimming and cleaning flash holes and making sure the case is properly sized without too much bumping of the shoulder as well as insuring the exact same amount of powder is being thrown in each case will do far more for you than Comp dies ever will.
Learn to do it right and you will get some darn good groups.
If you have a rifle that needs the bullets crimped, buy the Lee crimp die. About $12.00 per caliber or round, but they put the nearest thing to a factory crimp available. Just don't over crimp. They do help accuracy and are a must for semi auto, tube fed or hard kicking rifles with mags. They are about the only thing I'll buy from Lee.
Buy good equipment and it will last a lifetime if taken care of.
Buy the Book ABC's Of Reloading and get a reloading package from RCBS or Hornady. They will save you $$$ and come with just about everything you will need to get started.
if getting a reloading set up mail order, buy from Graf & Sons. They are a little more expensive then some, but charge only a $4.95 handling fee, it will save a bunch in shipping expenses. They have a good catalog.
Natchez shooters supply has some great prices, but you will pay shipping.
Always check the total price between those two places as well as others with shipping included. You will save on one or the other.
Buy powder and primers locally if possible, one box of primers and one pound of powder or 50 pounds of powder, you ar going to have to pay a $24.00 haz mat shipping fee on top of shipping costs.
Don't use max loads. very seldom are they the most accurate and they not only put extra wear on your gun, but leave a lot less room for error.
You may need to try several different powders and a bunch of different loads to find the one that really shoots.
I'll give an example. I have a modified Mini 14 that's kind of fussy on loads. The best 5 shot groups at 100 were about 1.5 inches and it took a lot of experimentation to get to that group size.
I bought a new IMR powder. At 21.5 grains, my groups looked like a shotgun, went to 23.0 grains and shot consistant .9"'s. 23.8 was the max load, so be patient.
I've been loading for 35 years and still love it.