Not new to muzzleloading but am to Flintlocks. Got a new Flintlock for PA and WV. Shot it about 15 times, cleaning after 2nd or 3rd shot. Using iron sights. Not getting a good group. Shooting 90 gr of Goex 2F powder and a Harvester crush rib sabot with a 45 cal/ 250 gr Hornady XTP. Anybody have any experience with this flintlock and what loads are you getting good results with ? Shooting at 50 and 100 yards.