I have Hereford barrow that is #250 with 35 days till weigh in #300 max. Need to burn some front end fat but keep shape could add some more middle and back shape. I’m a fan of the Purina products. Currently on 18%, Ultra Full, rolled oats and depth charge. Looking for some advise to not loose shape.

This diet Will do what you want but the pig will gain about 0.3 lb per day:
(Total daily feed; divide into 2 equal meals):
High Octane Fitter 35. 3 lb
High Octane Depth Charge. 8 oz

To gain about 1.3 lb per day, burn fat and help with middle:
(Total daily feed; divide into 2 equal meals):
Fitter 35. 3 lb
719 (18% feed). 1 lb
Ultra Full. 1 1/2 lb
Depth Charge 8 oz (1/2 lb)

Fitter 35 will ensure the pig doesn’t lose any muscle. It will gain muscle