250mg of testosterone will shut your down temporarily. Where do you life btw? In my country Sustanon and Nebido are the only choises when it comes to injectable testosterone.
Spelicialist around here, who have atleast somekind of understanind what they are doing, usually describe sus250 every 2-3 weeks. Some say that it needs to bee injected every 2 weeks. So in light of that, injecting 250mg every 4 weeks sounds horrible. I think that was the primary idea when sustanon was introduced into market many decades ago. When you look at sustanon pharmacokinetics and user experiences, it just doesnt work that way.
If you are going to take it, take it atleast every 2 weeks. Do you have any other options when it comes to injections?