I've seen the Blood Runner at the store, but have not tried them. They look to me like a fixed blade, though they say that they fly like field points. I use the Rage 100g 2-blade and have good success. Out of my bow they fly just like a field point. I shot a 6 point last fall and it's hard to describe the damage they do. Although I didn't get a complete pass through the blood trial was still 6' wide. By the time i walked the 100yds he went, my boots were literally covered in blood. I do not know how he made it as far as he did. One lung was cut in the top, but the far lung was cut almost in half. The most devistating BH I've ever used!
Member NRA, NAHC