Why do you say that?
This. And I don't believe 260 with perfect form is very difficult at his weight. Maybe at first, but after about three weeks (three to four times doing legs) you'll be laughing at it.
It's easy to get cocky with yourself once you start repping higher numbers. Don't let the 300 or 400 point get the best of you. Concentrate on the form, otherwise you might as well not work out legs. I'm 6'2" I hover between 190 and 200 and I can rep 450 six times, with good form. NOTE: I never said I did it easily lol. It's very taxing, and I only to it for one set. I like to consider my "MAX" set my 6 rep point. I don't believe in "maxes".
I used to be able to do that too! Sets of 400# plus were a regular occurrence in my gym trips. My probelm was is that I put way more effort into my "lower body" than I did my "middle" or "core" Even though I had spot-on form and my legs were plenty strong enough to take the abuse and do that weight, my lower back was not in such great shape. And at the age of 18 had to have surgery for a herniated disc. At least I was young and in very good shape, so recovery was quick, and I havent had any problems since. So, no matter what your goal, make sure your whole body is up to the task!