You didn't say which caliber you were shooting,if it was the 200 gr bullet for the 50 cal.I was told that some of the pedals would break off .and was no problem for the accuracy.They are 40 caliber bullets in a 40 to 50 cal sabot.I shoot them in my 50 cal encore and one or 2 pedals break off every shot but it shoots less than an inch @100 yds.
If you were shooting them in a 45 cal rifle,I would go along with the rest of these fellows and think you have a burr or something in the barrel,have never seen the pedals break off the 40 to 45 caliber sabots used for the 45 cal rifle.