We used to "trailer wean".... cows with calves moved to the barn to preg check the cows when the calves are in the 5-8 month range... early calving cows would have 6-8 month calves and the late calvers would be in the 5 month range... when cows were checked, the calves would get pulled and sold. Then we started keeping them and "backgrounding " the calves... weaning at the barn; again in the 5-7month range average.... 450-600 lb weights.... and keeping them the 30-60 days that the different programs required. We have also been buying some of the singles and small groups of 2-5 or so of BULL calves at the sales... which can be bought for cheaper than steers and singles and small groups often sell cheaper... and bringing home, working, and then incorporating into making larger groups of steers that are "value added" like
@Ky hills said. Then we could control when we sold and watch the markets with a few more options....
Calves will continue to nurse a cow for a year if she lets it out on pasture. They are getting most of their nutrition from their grazing at that time. The reason for weaning at the 6-7 month range is often because of timing of grass growth, moving cattle to/from pastures, and the general market and value of cattle/calves in their area.
Here the 450-600 wt range is the highest price per lb on most calves, most of the time. It also works with many that run cow/calf pairs on pasture... calves born in Spring... grazed all summer.... then as they are moved to winter pastures, pregnancy checks, things like that, the calves are weaned off in the fall at the 5-7 month age and sold. Many don't have places to run calves separate from cows and it is just the better thing and easier for all to sell.... the cows get a rest (should have at least 2 months before calving again but often it is 4 months or so for ease of handling the cattle) so in say Nov/Dec.. they are moved to "winter quarters" and fed until calving starts again....
Until we had access to the farm our late friend owned, we did not have places to wean and hold and feed calves either... they came off the cow and went to town. Except for the few heifers we really wanted to retain and they would get put where ever we could put them and keep them away from the bull.
So, now we do mostly all backgrounding the newly weaned calves. We are in more control of when we sell rather than having to sell right off the cows. We can hit the better markets pricewise. We do not contract our calves because we don't have the numbers all at one time. We do groups in the 10-25 and can match bought ones, with our own calves.
My son has put a pencil to it and he says he had around 1.80/lb in the 540 lb avg calves that he grazed last year, figuring the cost of the calves, feed to background here before putting out, vaccs, wormer, pasture rent, mineral, trucking out and back, and paying the guy that watches over them because they are 4 hrs away.....and they weighed just under 785 after about 4 months on grass and sold at 1.62 ?... he said with the weight gain, he made about $300 a head....profit.... they also did not gain quite as good as the year before because the grass was actually "washy"... alot of rain out there and they were out there about 3-4 weeks less than the year before because they were going to start timber cutting and had to be out....
This year IF things stay stable like they are now... he should do as good or better looking at the futures prices ..... ALOT depends on it staying stable ... and that is of course a crap shoot...
So
@gman4691 , I hope that I have given you a little of the reasoning that calves are sold here in the weights that they often are. EVERYONE does things a little differently... being in Tx you are dealing with different weather and grazing conditions than we are here... and a different breed/cross of cattle than we have up here in Va. Believe me, "eared cattle" of any type, get hurt terribly at the stockyard around here... and down your way something with some "ear" does better in your climate, heat and are much more common....