//my bullet do not removed after impact .and cause ent limit error

define _hit, flag7;
define _sp, skill40;
define _normal, skill50;
define _tm1, skill69;
define _reloadTm, skill70;

function wpf_bullet1();
function wpf_bulletEvent();

STRING md_bullet1 = "bullet.mdl";
ENTITY* wp_eBarrel;
action gun_barrel_act {
	wp_eBarrel = me;
	my.passable=on;
	my.pan=180;
	my._reloadTm = 16 * 1.5;
	while(me != NULL){
		if (my._tm1 <= 0) {
			if (mouse_left) {
				my._tm1 = my._reloadTm;
				ent_create(md_bullet1, my.x, wpf_bullet1);
			}
		}
		wait(1);
	}
}

function wpf_bulletEvent() {
	if(event_type == event_impact
	|| event_type == event_entity){
		my.event = NULL;
		my._hit = on;
		vec_set(my._normal, normal);
	}
}
function wpf_bullet1() {
	vec_set(my.pan, you.pan);
	my._sp = 100;
	my.ENABLE_IMPACT=on;
	my.event = wpf_bulletEvent;
	while(me != NULL) {
		if (my._hit == ON) {
			break;
		}
		ent_move(my._sp, nullvector);
		my._sp += 20 * time; //speed bullet
		wait(1);
	}
	if (my._hit == ON) {
		vec_scale(my._normal ,10);  // produce an explosion into the normal direction
		effect(effect_explo, 50, my.x, my._normal);	
	}
	ent_remove(me);
}