I missed the last one... I rarely, if ever, see calves nursing in November so I was figuring 4-5 months " on the tete" but that's purely from observational evidence .... Need to brush up on my book learnin'
As far as the antler growth rate, here is what I recollect ...
There are approximately 150 days of antler production for bulls. Larger bulls shed first to give them more time to grow their new set. Lots of factors affect growth rate including genetics ( most important), age and feed/water conditions but most info I have seen says the average is close to 1/2" per day (1" would be max). How does this equate to score ? It's important to remember that a bull's "score" is based on length of the beam and all points but also factors in measurements for mass and spread, which don't relate to our growth rate estimates. The score also counts both sides of the rack...
So for a single side, the total of the linear measurements would give us a better idea of the growth rate. Lets say one side measured 50", 16,16,9,14,8 ( about a 300" bull). That's 113". Divide by 150 days and you get .753" per day. That's the way I understood it but I could be wrong...