You will have to experiment with as many different brands as you can afford to find out which it likes.
There are varying opinions on what ammo is the "best." Generally speaking, the best ammo to use is whichever ammo is the most reliable in your particular gun.
Federal premium ammo
Tap the top of the clip with small hammer to close the gap where shell goes into it . Do a couple taps then test fire, repeat until it stops jamming lorcins are know for this problem and my neighbor was a gunsmith , he told me about this and I have had no issues since.
The ammuntion it is chamberd for.
Idaho potatoes
I have had good success with Federal rifle ammo.
Gold Dot
Typically the best ammo for your Windicator is what shoots best in it.There are many different brands and weight of ammo available for you to try.I find that most every firearm likes one or two loads the best.It will be up to you to find out.If you do reload centerfire ammo then it is really enjoyable to try different weight bullets and powder combinations to bring out the best of your firearm in terms of accuracy and velocity.
Best would depend on intended use. Federal makes good 30-06 ammo. Soft point for hunting, FMJ for target use.
Minigun is the best weapon because its lot of ammo and really deadly
qualitydefenseammo. com is the best website in united states
Whichever ammo is the most reliable in the gun. For the most part, the only way to know is to shoot different types of ammo through the gun.