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Aerodynamically it will be much worse than a BB with a backspin, simply because that above design will suffer more drag due to the two rings (vorticies behind the first, much bigger vortex behind the bullet as well. At least a BB with a back spin on it has a much smaller vortex behind it, compared to a BB with no backspin (hop up generates lift as well as drag reduction).
Try a redesign with your concept, taper the back end of the bullet, same principal idea as why modern long range bullets (aka since WW1) have a boattail, reduced drag, more efficient trajectory, longer range accuracy than a flat bottomed bullet.
Regarding the hop up in guns, just need minimal hop up setting to keep the round seated in the chamber.
I really like the thought put into this though, very creative, I'm going to enjoy watching this thread!
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