[A 7 Round tube does NOT always fit 7 rounds in the M4]

Well I'll be F'd.  It was some work without the special modified wolf spring, but I actually got 7+1+1. Thank you. Your explanation gave me what I needed to go back and try again

[A 7 Round tube does NOT always fit 7 rounds in the M4]

Do you mean what I have seen referred to as ghost loading ?

[A 7 Round tube does NOT always fit 7 rounds in the M4]

So please tell me how you are supposed to fit 19 1/4" of shells in an 18 1/4" magazine? Since you are already a full inch beyond the length of the tube without even addressing the spring or follower or retension clip adding at least another inch to the equation. I would like to know how you manipulate the laws of physics to make this happen.