Yes, but you change one little thing and it changes many things. Adding 100 gr up front will likely mean cutting arrow shafts shorter, or buying stiffer ones because they will suddenly be under spined. Changing arrow length might mean a draw length adjustment, maybe new draw mods on your cams, and/or a new d-loop or even a new release to compensate. Then your bow tuning will change and have to be re-dialed in for good arrow flight again. The dreaded domino effect. Rarely could you just slap 100 extra grains on the front of an arrow and go shoot accurately without making other mods. And don't do it right before the season opener, because it might take weeks or months to iron everything out. BTDT.
I added 50 gr insert weights to my Gold Tip Hunters, along with 100 gr broadhead, 29-1/4" length carbon to carbon and about 470 gr total. Bow is Hoyt Carbon Spyder Turbo set at 65 lbs. Adding the weights bumped my shafts from 340 spine to 300. The 300's do fly better, but it was an unexpected expense to buy new shafts and fletch them, and lots of tuning to dial it all in again. Don't know if the extra 50 gr was worth all that.