well primo is primo, but the absorption of primo acetate orally is only 20-40% depending on which profile or writeup you read. (its not 17aa so much of it is destroyed by the liver)
assuming a decent primo enan IM dose is 500-1,000mg a week you see the problem.
if you're willing to do ~300mg a day of oral primo, fine. otherwise forget it. (p.s. its considered safe because of lack of 17aa, but it IS methylated if I recall)