Never do 250mg test per week. You're shutting them down and not really getting the benefits. Doesn't make sense. 500mg is OK but if you're going to shut em down then I go 750mg/week 12 week and front load the first week at 1000mg-1500mg. Then you'll see results.
If you're going to screw with your system atl east make it worth while.
Frontloading is pointless. If you're going to run a cycle, stay consistent with the dosage from start to finish. You don't need to frontload, the shock the the system from taking in exogenous testosterone will be more than enough to initiate growth.
DIV