Changing finger pull on a Winchester stallion xbow
 

Is it possible to change the finger pull on a Winchester Stallion xbow?

I'm guessing you mean TRIGGER PULL WEIGHT!
as not sure what you mean by finger pull?
but IF your X bow has an adjustable trigger, then yes, if NOT then NO
best advice is contact the OEM(Winchester and ask them, , know your model info and even serial number ,as they may ask!)
NOW if you asking how to change the DRAW weight of the BOW(most pull back with fingers so??)
I again, would have to think NO, on this, unless MAYBE addling a slightly longer sting might do so, but I wouldn;t suggest doing this
, due to X bows are designed how they are for reasons!