Anyone use the 11%-13& egg weight loss method to determine rh levels?

[frenchblackcopper]

Does anyone here use the above method for checking and adjusting your humiditity levels in your incubators? I was told this range is the ideal weight loss for eggs during their 21 day incubation period,,and today at 13 days into their incubation period, I weighed 4 eggs again and checked the progress compared to their weights when put into the incubator.
From my calculations tonight, I'm not quite at a 5% weight loss yet,but still have 8 more days of incubating to go,so I have now set my rh level down to 30% and will recheck again in 2 days.Does anyone else use this method to know if their humiditity level is right on,or does most people just guess and do okay? I have read all over diffrent rh levels for hatching chicken eggs,some upwards of 55% for 18 days,and then 70-75% for the last 3 days,,but if my rh level was at 55% the entire past 13 days,my weight loss per egg would be worse,or less than it is now,,I started at 55% for 3 days,then lowered to 42% for the past 10 days,,now tonight set down to 30% for last 8 days,,I still need to lose around 4 grams of weight per egg in these upcoming 8 days,and thats at the lower side of the recommended 11%-13% range.Does this method work,and how many actually weigh their eggs beforehand,and check during incubation and make adjustments? Thanks

 

[dancingbear]

The more precise I tried to get, the worse the hatches got. I found that if I just keep the humidity around 45% the first 18 days, use an auto turner, and raise the humidity to 55% the last three, I get great hatches, chicks get out of the shells easily, and are just damp, not soaking wet, not sticky, not slimy.

I put a small piece of sponge on a plastic lid, under the air hole that the red plug goes in, (which I stopped using altogether, I don't plug any ventilation holes at all) so I can dribble in a little water onto the sponge when I need to.

I use an LG with a fan, keep the temp 99.5F-100.5F, and they do great. The less I mess with it, the better they turn out. I stopped staying up all night when they hatch, too. Less stress on me, and the chicks do better, too.

Others may have done better being as precise as possible, but it seemed to just mess things up for me.