First: Master Airscrew props weigh much less than Apc props, sometimes 1/2 as much.

Second: What is the point of trying to find out which is the best 10 x 6 prop or other given size of prop? We should instead attempt to find out which prop develops the most thrust for a given load on the engine. If a MA 11 x 6 prop loads an engine the same as an APC 10 x 6 prop, which do you think would produce the most thrust? I think this type of comparison is more useful but seldom considered.