Awhile back - I think in the Duplex .38 thread - there was mention of a formula that could roughly predict how a projectile would penetrate in ballistics gel. Sort of as a napkin hypothesis to test an idea prior to committing to gel testing.
Does anyone here recall that formula?
I'm trying to figure out what the minimum impact velocity would be for Steel Buckshot to hit 12" penetration.
0.312" Steel Bearing = 32.4gr
Turns out, Steel Bearings are super duper cheap - far below the cost of regular Buckshot. 10k 8mm Bearings is only $116, or $0.10 per 9 pellet load.
The idea I had was for a 'Ultra Low Recoil' Buckshot load, that offers as close to 00 terminal performance with less recoil.
Regular Lead 00 buck = 484gr @ 1325fps = Power Factor 641
Reduced Recoil @ 1145FPS= PF 554
vs
9x Steel '0' Buck = 292gr
x1400fps = 1267 ft/lbs / PF 407
x1300fps = 1092ft/lbs / PF 378
The question is how fast would the lighter steel buckshot need to be traveling at impact to hit 12" penetration?