Looking for advice on honors show chow feeding

This is our second year showing pigs. Due to availability and price, We are feeding Honors over Moormans. We have late Jan early Feb pigs and our show is in Aug. We weighed on 4-7 (38, 45,and 55) How long should we keep them on grower before switching to finisher and is the 709 or 809 better? Should I add other supplements and when? afraid of going over weight limit of 270, but want to get the most out of our pigs!! Thanks in advance for your advice. Oat Groates are hard to find so is there a substitute to add width?

depth charge w/HSC

http://honorshowchow.com/feedingstrategyarticles/HSC%20Strategies%20For%20Feeding%20Modern%20Showpigs.pdf

Get them to 150lbs then start adjusting to what the hog needs in feed.