Michael's UV Resin slugs have weird aerodynamics

Desistx

This may not be due to the shape alone. Reference Holdover vlog: He's shown that overpowering many kinds of pellets makes them spiral. I'd be curious to see if the light weight of the resin is responsible and if a lead or brass round would fly straight with the correct weight and powder load.

Ryan Simpson

Gives a new meaning to "accuracy nodes": if your target happens to be at a distance where this thing has a zero-crossing with your point of aim, it is MONEY.

TAOFLEDERMAUS

lol

TAOFLEDERMAUS

lol

TAOFLEDERMAUS

we tried a rifled choke giving is very little spin and it hit backwards. A bullet shape projectile will always need spin for stability.

TAOFLEDERMAUS

lol

TAOFLEDERMAUS

excellent points!

Buzzin

Cool....a projectile that knows how to do evasive manoeuvres, try stopping that one with another bullet or a sword! Those are completely normal ways to stop a bullet/projectile right? RIGHT? :|

Scott Cress

Did you try a smooth bore and I missed it?

Tim Matthews

I wonder if the barrel and projectile even twisted in the same direction

Bad at 20 and 40? Try odd number distance,,,,,,,,,,,,like 3 yards.

So light it zigged and zagged like an empty canoe in rapids. Amazing

George Steele

About a year or two ago, I read an external ballistics paper that documented similar instability in, of all things, 5.56mm Nato ammunition. I think it was related to a test of rifling twist in general, but the bullets were "overstabilized" and followed a similar, but damped, corkscrew flight pattern - centered on a barrel axis extension line - until some few yards out of the muzzle before settling down to a normal flight. At the end of the bullet's trajectory, it destabilized once again - as it passed through to subsonic velocity - and resumed a corkscrew flight pattern, that increased with distance. It suggests that - for these lightweight, long, large bore bullet-shaped projectiles - there is some combination of rifling twist and muzzle velocity (i.e., spin rate) that would produce a stable flight pattern (assuming that the bullets themselves are reasonably well-balanced). It would be interesting to figure out what that twist rate is for these projectiles; I'd guess a very slow twist. I also think that the spiral grooves on the nose were meant for firing from a smoothbore; out of a rifled barrel, I'd think an uninterrupted, smooth ogive would introduce fewer complications. Interesting video, as always.

Aaron Neumeyer

I can't believe that Gregg didn't say "failure & mediocrity" which was also the name of an 80's grunge band I was in. Great vid!