Question: how much weight should i gain a month when bulking?
Answer: Eric Helms from MASS: 0.5–1.5% of body weight gained per month. For a 150-pound guy, that's 0.2–0.5 pounds per week. Andy Morgan from Ripped Body: 1–2% of body weight gained per month. That's 0.3–0.7 pounds per week.