jackssmirkingrevenge wrote:How about some alternative ammunition
3/8" ball bearing buckshot for example...
Shame about the calibre, I would have offered some machined rounds and sabots. As it is anything above 1.5 inches diameter is possible but inconvenient.
Ahh good idea with the buck shot - that will look rather interesting on the vehicle.
I found a good deal on 100 1/2" bulk steel bearings that I just got on the 'Bay. I can make 3 or 4 buckshot rounds (I made a prototype shot shell "wad" and it holds 21 1/2" balls). I'll have some left over for the mighty mini cannon then!
Early HGDT estimates at 10X conditions give me a velocity of 1092 - more than fast enough to pass through sheet metal
I just reran a HGDT simulation of my 8X ceramic ball tests... 1071fps... that's scarily accurate

(I chrono'd 2 shots right at 1070fps)
I really want to finish my APFSDS round

I will be doing some welding the rest of this week so perhaps I can toss it in the mix. What does everyone think of the tip? attempt to harden it via flame and/or oil - or just sacrifice some old drill bits? Need a Sabot system too... oi vai

Hopefully a disc/cylinder with a push rod/holder will work sufficiently (dart shaft will be constructed of steel tubing)!