Analysis of information sources in references of the Wikipedia article "Fullbore target rifle" in English language version.
T2.1. Rifle: May be built around any manually loaded action designed to safely fire either of the permitted cartridges. In target rifle category the only permitted cartridges are the .308 Winchester / 7.62x51 commercial metrification equivalent and .223 Remington / 5.56x45 commercial metrification equivalent. Unless prevented under match conditions, the .223 Remington / 5.56x45 is permitted as an alternative to the .308 Winchester / 7.62x51 subject to the provision that a competitor may not change from a rifle of one calibre to the other, at any stage within a match, whether team or individual, single or multi distance or aggregate.
151 In NRA TR competitions where ammunition "as issued" is specified: (a) only 7.62 x 51 mm or .308" Win target rifles may be used. (b) only ammunition issued by the NRA, without any modification, may be used (see Para 544). (c) NRA issued ammunition will conform to CIP dimensions for Win .308" and will develop a maximum average pressure under CIP test procedures of 3650 Bar. Competitors are responsible for ensuring that their rifles are safe to fire such ammunition. Ammunition "as issued" is specified for all TR competitions in the Imperial Meeting, and at some other NRA events. At other times any ammunition may be used, all users of which are responsible for ensuring that it is in every respect safe and within range safety parameters
T2.1. Rifle: May be built around any manually loaded action designed to safely fire either of the permitted cartridges. In target rifle category the only permitted cartridges are the .308 Winchester / 7.62x51 commercial metrification equivalent and .223 Remington / 5.56x45 commercial metrification equivalent. Unless prevented under match conditions, the .223 Remington / 5.56x45 is permitted as an alternative to the .308 Winchester / 7.62x51 subject to the provision that a competitor may not change from a rifle of one calibre to the other, at any stage within a match, whether team or individual, single or multi distance or aggregate.
151 In NRA TR competitions where ammunition "as issued" is specified: (a) only 7.62 x 51 mm or .308" Win target rifles may be used. (b) only ammunition issued by the NRA, without any modification, may be used (see Para 544). (c) NRA issued ammunition will conform to CIP dimensions for Win .308" and will develop a maximum average pressure under CIP test procedures of 3650 Bar. Competitors are responsible for ensuring that their rifles are safe to fire such ammunition. Ammunition "as issued" is specified for all TR competitions in the Imperial Meeting, and at some other NRA events. At other times any ammunition may be used, all users of which are responsible for ensuring that it is in every respect safe and within range safety parameters
