Yes , probably 10- 15 fps , dont touch it until after season is over .Id say with the sucess youve had , messing with it might be a misstake , but us guys have to tinker with stuf to "make it better" I know cause I are one .
You may require new arrows , or have to cut down your arrow length , or lessen the tip weight you are useing to get the correct spine , and good arrow flight .Allso , you live in a pretty cold climate , and drawing a heavyer bow when its cold can be alot harder than in the warm weather .