Hi MD
I'm no expert, but here's what was demo-ed to me. I bought my 150HP RV 8 a year ago from a Air Force F-15, F-4 driver with about 500 hours in the RV 8. He probably runs about 210-220 Lbs, and I was 183Lbs. With both of us in the airplane, he got it off in about 500 Ft. and 3 point landed in about 600Ft. At the time I thought "so what", but now that I've been flying it for a year and seen some of these fields, I'm thinking, " Boy, wish I could do it"!!
We've got an 1500 Ft. strip nearby and I won't touch it. I won't touch anything less than 3000 Ft., but that's my personal abilities. My airplane, even with only 150 Hp, in the right hands will do it.
It was sunny, and the grass was short and dry. I don't know how much fuel we had, but if full at 42 Gal., that would have put us at 1721 Lbs. Half tanks at 20 Gal. would have put us at 1589 Lbs.
I've been practicing short field takeoffs and landings, but what I'm going to do is measure 600 Ft. beside the runway I use ( cement), and then put some sort of marker there, so I can see from the cockpit how I'm doing.