There's diminishing returns ive found after about 500, you will see noticeably better gains from 500-750, but not like from 300-500, and even less from 750-1000. I prefer to keep my test at 250 and add in stronger compounds like deca or tren at higher doses for most cycles. People say always do a 2:1 or 1:1 test deca ratio, but ive found with 300mg of mast and caber, ive never needed over 250 mg of test. I just bloat really bad over 250 test.