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A projectile is provided comprising a body with a channel that contains a non-Newtonian fluid. In various embodiments a plunger is located in the channel, wherein the plunger transmits a force to the non-Newtonian fluid upon interacting with a target, causing the non-Newtonian fluid to exert a press

A projectile is provided comprising a body with a channel that contains a non-Newtonian fluid. In various embodiments a plunger is located in the channel, wherein the plunger transmits a force to the non-Newtonian fluid upon interacting with a target, causing the non-Newtonian fluid to exert a pressure in the channel, and wherein the viscosity of the non-Newtonian fluid changes upon interacting with the target. By way of non-limiting example, the non-Newtonian fluid of embodiments of the present invention can comprise a shear-thickening fluid that increases its viscosity with at least the rate of shear upon interacting with the target.

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1. A bullet that uses a non-Newtonian fluid to promote penetration of a target, the bullet comprising: a. a body including a channel, wherein the channel contains the non-Newtonian fluid; andb. a plunger that is harder than the body and located in the channel, wherein the plunger transmits a force t

1. A bullet that uses a non-Newtonian fluid to promote penetration of a target, the bullet comprising: a. a body including a channel, wherein the channel contains the non-Newtonian fluid; andb. a plunger that is harder than the body and located in the channel, wherein the plunger transmits a force to the non-Newtonian fluid while in contact with the target, causing the non-Newtonian fluid to exert a pressure in the channel, and wherein the viscosity of the non-Newtonian fluid increases with at least one of a shear rate or a shear time while the plunger is in contact with the target, thereby promoting penetration of the target. 2. The bullet of claim 1, wherein the channel includes a compressible material. 3. The bullet of claim 1, wherein the channel includes one or more recesses to direct the pressure received from the non-Newtonian fluid. 4. The bullet of claim 1, wherein the non-Newtonian fluid acts like a solid in response to at least one of the shear rate or the shear time. 5. The bullet of claim 4, wherein the bullet comprises a centerfire rifle bullet. 6. The bullet of claim 4, wherein the plunger comprises at least one of steel, tungsten, titanium, and aluminum. 7. The bullet of claim 4, wherein the body comprises at least one of lead, bismuth, and copper. 8. The bullet of claim 7, wherein the bullet comprises a centerfire rifle bullet. 9. The bullet of claim 1, wherein the bullet comprises a centerfire rifle bullet. 10. The bullet of claim 1, wherein the plunger comprises at least one of steel, tungsten, titanium, and aluminum. 11. The bullet of claim 1, wherein the body comprises at least one of lead, bismuth, and copper. 12. The bullet of claim 11, wherein the bullet comprises a centerfire rifle bullet. 13. A bullet that uses a shear-thickening fluid to promote penetration of a target, the bullet comprising: a. a body including a channel, wherein the channel contains the shear-thickening fluid; andb. a plunger located in the channel, wherein the plunger transmits a force to the shear-thickening fluid while in contact with the target, causing the shear-thickening fluid to exert a pressure in the channel, and wherein the viscosity of the shear-thickening fluid increases with at least a rate of shear while the plunger is in contact with the target, thereby promoting penetration of the target. 14. The bullet of claim 13, wherein the plunger comprises a material that is harder than the body. 15. The bullet of claim 14, wherein the body comprises at least one of lead, bismuth, and copper, and wherein the plunger comprises at least one of steel, tungsten, titanium, and aluminum. 16. The bullet of claim 13, wherein the channel includes a compressible material. 17. The bullet of claim 13, wherein the channel includes one or more recesses to direct the pressure received from the shear-thickening fluid. 18. The bullet of claim 13, wherein the shear-thickening fluid comprises at least one of a suspension or dispersion of particles in an aqueous solution. 19. The bullet of claim 18, wherein the particles have an average diameter of 10 to 1000 microns. 20. The bullet of claim 18, wherein the particles comprise at least one of polymer, silica, calcium carbonate, or oxide particles. 21. The bullet of claim 18, wherein the solution includes at least one of ethylene glycol or polyethylene glycol. 22. The bullet of claim 13, wherein the shear-thickening fluid acts like a solid in response the shear rate. 23. The bullet of claim 22, wherein the body comprises at least one of lead, bismuth, and copper, and wherein the plunger comprises at least one of steel, tungsten, titanium, and aluminum. 24. A bullet that uses a time-thickening fluid to promote penetration of a target, the bullet comprising: a. a body including a channel, wherein the channel contains the time-thickening fluid; andb. a plunger located in the channel, wherein the plunger transmits a force to the time-thickening fluid while in contact with the target, causing the time-thickening fluid to exert a pressure in the channel, and wherein the viscosity of the time-thickening fluid increases with at least a shear time while the plunger is in contact with the target, thereby promoting penetration of the target. 25. The bullet of claim 24, wherein the plunger comprises a material that is harder than the body. 26. The bullet of claim 25, wherein the plunger comprises at least one of steel, tungsten, titanium, and aluminum. 27. The bullet of claim 14, wherein the body comprises at least one of lead, bismuth, and copper. 28. The bullet of claim 14, wherein the time-thickening fluid comprises a base compound. 29. The bullet of claim 28, wherein the base compound includes a silicon-based organic polymer. 30. The bullet of claim 29, wherein the base compound includes Polydimethylsiloxane. 31. The bullet of claim 30, wherein the time-thickening fluid includes boron. 32. The bullet of claim 31, wherein the bullet comprises a centerfire rifle bullet. 33. The bullet of claim 24, wherein the channel includes a compressible material. 34. The bullet of claim 24, wherein the channel includes one or more recesses to direct the pressure received from the time-thickening fluid. 35. The bullet of claim 24, wherein the time-thickening fluid comprises a base compound. 36. The bullet of claim 35, wherein the base compound includes a silicon-based organic polymer. 37. The bullet of claim 36, wherein the base compound includes Polydimethylsiloxane. 38. The bullet of claim 37, wherein the time-thickening fluid includes boron. 39. The bullet of claim 24, wherein the time-thickening fluid acts like a solid in response to the shear time. 40. The bullet of claim 39, wherein the plunger comprises a material that is harder than the body. 41. The bullet of claim 40, wherein the plunger comprises at least one of steel, tungsten, titanium, and aluminum. 42. The bullet of claim 40, wherein the body comprises at least one of lead, bismuth, and copper. 43. The bullet of claim 40, wherein the time-thickening fluid comprises a base compound. 44. The bullet of claim 43, wherein the base compound includes a silicon-based organic polymer. 45. The bullet of claim 44, wherein the base compound includes Polydimethylsiloxane. 46. The bullet of claim 45, wherein the time-thickening fluid includes boron. 47. The bullet of claim 46, wherein the bullet comprises a centerfire rifle bullet.