my dad just recently purchased a CVA optima pro, and we were out shooting last week a little, and he was havein a hard type getting power belt bullet to go down the last 3 or 4 inches of the barrel and when he shot he said that it kick a lot worse than his other muzzleloader. he is shoot 80 grns. of pyrodex with a 295grn. powerbelt HP, he shoots basically the same set up with his other gun and has no troubles at all with it. any ideas as to what it would be??