JSB MARK II @ 1030

Yeah, I know that is WAY too fast. Should be spiralling like bent drill bit!
Shooting slugs thru my Huben @960, end of your nose accurate.
Let's try some Mark II, but I don't want mess with the tune. Let's just see if and what it shoots. On the dot accurate @ 90 yds.
I don't see spiralling. Am I just pushing past the skirts range to wobble? ( aeronautical term.)
Sound like a 22 rim and hits like it to! It hits head first, no hourglass hit. If I weren't just messing around, I'd slow her down to the big 900.