i've got a bunch of em , they will gain just fine , pour the corn to em. i just sent off four to the butcher a couple weeks ago and we netted out an average of 275 lb sides none under 260 , with the holstein influence probably any weight over 1150 will be hard won , and you want them there at about 16 months or less is what i have been told. they were getting about 15 lbs a day of corn for the last three months and they could have eaten more but i couldn't afford more. If your weight estimate is correct they are a bit behind the curve . feed heck out of em ! We do alright with these but i sure do like the pure beef breeds , a lot easier to get the weight on.