The only difference between a Lee Load All and a Mec 600 jr. is the price.

I bought my Lee some 16 or more years ago for a grand total of $40!

At that time, the Mec was around $175 + the cost of the powder jugs and the bushings.

I only ever did two things to my Lee

1 - I drilled a hole and moved the plastic part that aligns the wad - up the colum - for shells bigger than 2 3/4

2 - I had my dad make me a longer resizing bushing for the longer shells.

I have successfully reloaded 3 1/2 inch magnum shells with mine with little or no problems.

The Mec will load faster than the Lee, but I like knowing that my reloaded will consistently throw an accurate amount of powder and shot - everytime I pull the lever.