A projectile with a nominal calibre, for use in a rifled barrel, the projectile comprising: a monolithic body, said monolithic body comprising a. an ogival portion forming the front of the monolithic body; said ogival portion at a point of intersection abuts with b. an elongate cylindrical core, said elongate cylindrical core comprising at least three bands located circumferentially thereon, said at least three bands (5a,5b,5c) protruding radially outward therefrom; and said elongate cylindrical core abuts c. a boat tailed portion, forming the rear of the monolithic body, wherein a first band of the at least three bands is located at the point where the elongate cylindrical core abuts the boat tail section, wherein a third band of the at least three bands is located rearwardly, from the point of intersection, at a distance in the range of from 80% to 120% of said nominal calibre, wherein the third band is a forward most band of the at least three bands, wherein a second band of the at least three bands is located between the first and third bands on said elongate cylindrical core; wherein the monolithic body is formed from a metal having a Vickers Hardness of at least 550HV, wherein the at least three bands (5a, 5b, 5c) form grooves (28a, 28b), wherein a deformable jacket, surrounds the monolithic body, which defines an outer diameter of said projectile and wherein said bands protrude above the elongate cylindrical core a height in the range of from 0.5% and 4% of the nominal calibre of the projectile, such that the leading edge of the third band and the point of intersection form two contact points, such that when the jacket is applied it forms a cavity, such that when the jacket is compressed when it impacts on the rifling of a barrel, the jacket deforms into the grooves (28a, 28b) and into the cavity. a. an ogival portion forming the front of the monolithic body; said ogival portion at a point of intersection abuts with b. an elongate cylindrical core, said elongate cylindrical core comprising at least three bands located circumferentially thereon, said at least three bands (5a,5b,5c) protruding radially outward therefrom; and said elongate cylindrical core abuts c. a boat tailed portion, forming the rear of the monolithic body, wherein a first band of the at least three bands is located at the point where the elongate cylindrical core abuts the boat tail section, wherein a third band of the at least three bands is located rearwardly, from the point of intersection, at a distance in the range of from 80% to 120% of said nominal calibre, wherein the third band is a forward most band of the at least three bands, wherein a second band of the at least three bands is located between the first and third bands on said elongate cylindrical core; wherein the monolithic body is formed from a metal having a Vickers Hardness of at least 550HV, wherein the at least three bands (5a, 5b, 5c) form grooves (28a, 28b), wherein a deformable jacket, surrounds the monolithic body, which defines an outer diameter of said projectile and wherein said bands protrude above the elongate cylindrical core a height in the range of from 0.5% and 4% of the nominal calibre of the projectile, such that the leading edge of the third band and the point of intersection form two contact points, such that when the jacket is applied it forms a cavity, such that when the jacket is compressed when it impacts on the rifling of a barrel, the jacket deforms into the grooves (28a, 28b) and into the cavity. wherein a first band of the at least three bands is located at the point where the elongate cylindrical core abuts the boat tail section, wherein a third band of the at least three bands is located rearwardly, from the point of intersection, at a distance in the range of from 80% to 120% of said nominal calibre, wherein the third band is a forward most band of the at least three bands, wherein a second band of the at least three bands is located between the first and third bands on said elongate cylindrical core; wherein the monolithic body is formed from a metal having a Vickers Hardness of at least 550HV, wherein the at least three bands (5a, 5b, 5c) form grooves (28a, 28b), wherein a deformable jacket, surrounds the monolithic body, which defines an outer diameter of said projectile and wherein said bands protrude above the elongate cylindrical core a height in the range of from 0.5% and 4% of the nominal calibre of the projectile, such that the leading edge of the third band and the point of intersection form two contact points, such that when the jacket is applied it forms a cavity, such that when the jacket is compressed when it impacts on the rifling of a barrel, the jacket deforms into the grooves (28a, 28b) and into the cavity.