There are a lot of opinions on feeding.

I use weights for everything a juvinile is under a given weight to me it does't matter if it is a year or older.

My method.

under 500gm get 10% (loosely) of their weight a meal. (i.e. a 300gm snake would get a 30 gm meal) every 4-5 days
500-1200gm get 10% every 7 days
adults 1200+ (females I drag some I often wait until they are 1600+) get 3-5% meals every 5 days.

There have been some reports on Leptin build up with large meals less frequently. It is associated with fatty liver disease and obesity.