i first guess in 50s so 50, 100, 150, 200 etc if i find a bracket in which it changes the load factor to below 100 i average. e.g 150 = 100% 200=80% so next i go for 175 the work in 5s and 10s the finally 1s until it tips in my favour, i never bother with .01 as this takes for ever and it can very little difference.
Another tip is that if u put a round hundred in e.g. 100, 200, 300 etc and it gives a LF of between 85% and 100% lower it to the percentage e.g. 200 gives a LF of 93 i lower it to 193 this will either give u 100 or below if it is 100 work up until it gives u the tipping point if it is below work down this generally works but is not perfect
