Primo is better for cutting. Deca is better for minor bulking cycles. More sides with Deca… user assumes all risk. I can’t stand Deca sides, Primo gives me only benefits even at low doses (150 or less per week, injecting ED or EOD). Bulking though… why bother with Deca at all – better options abound for bulking IMO and I’ve run 400mg/week of it but wasn’t impressed. All of my gear is pharma, all tested. YMMV… give Deca a shot, why not right? Might be good for your endocrine system and cr4p for other people’s. We’re all different that way.