The Dragon Slayer is a great gun, very accurate, but hot enough power for the bore size.
It was designed for round ball, and chambered for RB. the Slugs are a lot longer than the rb, and this means the bullet gets tight before the lever closes all the way.
Hard Cast bullets are not good for airguns, as they create too much friction in the barrel. The airgun has WAY less force than a Powder burner, and the soft Lead will cut from the Rifling way better.
Bob Vogal has a 220gr HP that fits the DS well. it is short, and fits the chamber well. he made a light bullet (+-175gr HB) but it does not work as the Hollow Back does not load correctly with the bolt in the DS.
The DS is accurate out to 100yards, but you are limited when using RB, if you get the 220HP, it will increase your range, but you still have a very loopy trajectory as the DS shoots slowly.
Good luck with it, they are fun to shoot, especially Treerats.
More than just a way of life.
It's not a sickness, I can quit anytime I want.
I just don't want to.
Besides, they aren't big enough yet.