a light hollowbullet at high velocity is explosive.a heavy hollowbullet at high velocity is not as explosive.if we are talking muzzleloader bullets.if your 240 gr xtp are not hollow point,i dont think problem but many here are better at that than me.being i am somewhat a person who has seen many deer killed with many bullets of diff weights/velocity.i am talking only whitetail deer.we never had choice of bullets we do today in muzzleloaders.i only use flintlock.i would not use a hollow point bullet in a in-line if it is shooting at high velocity of the in-line. again , i am not expert only what i would do. in the flintlock,loaded low charges which i LIKE. best bullet i feel out there is the HOLLOW POINT POWERBELT.295 and up.what a bullet for the flintlock hunters. i am retiring my maxi-balls now. may they rest in peace, ha.take care.