I think I understand now. So fourty of say muscle wings will give me 10 points of EV's in my attack stat. And I can get up to the usual 256 -or somewhere around ther- points by just using wings.
not that that's the most time eficent way. I was just trying to understand the calculation of it.
if that's right then I understand how it works now. I'm not so confused as to why my stats aren't growing.