Very common. 4-6 weeks is ideal for methylstenbolone. But 6 weeks would prob be better at 20mg no hitting 30. It just depends on what he can handle. That's why I said or something close to this so he knows msten does not have a set amount of weeks that it must be run. Iv heard of people running it 2 weeks, and also 8. 4-6 would be ideal for safety and gains. IMO.