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Tarvas bullet selection

Update 9.7.2021

Caliber
 Material
number 		Weight
(g) 		Weight
(grain) 		Length
(mm) 		Boat
tail
(mm) 		Bullet
diameter
(mm) 		Tail F
(mm) 		BCG1 Recomended
impact
speed
(m/s) 		Recomended
Caliber 		Minimum
rate of
twist
6,5 mm / .264 T264130-1
 8,4 130 32,8
 1,0 6,70 6,45 0,300 850-550 All 6,5 mm / .264 8,7"
6,5 mm / .264 T264125-1 8,1 125 32,1 1,0 6,70 6,45 0,300 850-550 All 6,5 mm / .264 8,7"
6,5 mm / .264 T264125-2 8,1 125 31,9 1,0 6,70 6,45 NA 850-550 All 6,5 mm / .264 8,7"
.270 / 7,03 mm T270130 8,4 130 30,0 0,9 7,03 6,81 NA 850-550 All .270 10"
7 mm / .284 T284150-1 9,7 150 33,4 2,4 7,20 6,61 0,301 850-550 All 7 mm / .284 10"
.308 / 7,82 mm T300150-1 9,7 150 29,0 2,3 7,81 7,25 NA 850-550 All .30 / 308 Win 12"
.308 / 7,82 mm T300165-1 10,7 165 31,4 2,5 7,81 7,20 0,301 850-550 All .30 / 308 Win 12"
.308 / 7,82 mm T300165-2 10,7 165 31,4 2,5 7,81 7,20 NA 850-550 All .30 / 308 Win 12"
.308 / 7,82 mm T300180-1 11,7 180 34,0 2,0 7,81 7,30 0,317 850-550 30-06, 300 Mag 11"
8 mm / .323 T323180-1 13,0 200 31,9 2,5 8,20 7,60 0,304 850-550 8 mm JS/IS Diameter 8,20 12"
.338 / 8,58 mm T338200-1 13,0 200 32,2 3,2 8,58 7,80 0,304 850-550 All 8,58 mm / 338 12"
.338 / 8,58 mm T338225-1 14,6 225 35,4 3,2 8,58 7,80 0,340 850-550 8,58 mm / 338 Mag 10"
9,3 mm / .366 T366250-1 16,2 250 34,2 2,5 9,28 8,67 0,323 850-550 All 9,3 / .366 14"
9,55 mm / .375 T375270-1 17,5 270 35,0 2,5 9,51 8,90 0,350 850-550 All 9,55 / .375 12"
Target Bullets: TA
.308 / 7,82 mm TA30155-1 10 155 32,1 3,5 7,81 6,95 0,400 All 30 / 308 Win 12"
  • All bullets open still with impact speed 500 m/s when shot on tissue with high water content. Shots on game at impact speed below 500 m/s are not recommended.
  • Bullets .264 - .338 are tested @ 900 m/s impact speed. Although field experience has shown good results in meat destruction even with high impact speeds, the amount of meat destruction increases with impact speeds over 900 m/s.
  • Ballistic coefficients (BC) is according to SAAMI G1 model. All results are tested by shooting.
  • Follow the recommended rate of twist. The value is given in form like for example 10" which means how many inches bullet travels in the barrel when turning one revolution. Required twist means that the rate must be at least XX" or less. For example if required  is 11" the bullet works well with twist 11" or 10" but not with 12".

Below standard rate of twist for some common calibers. NOTE: Some manufacturers are making exceptions on these standard values. If you are not sure, twist can be can measured by pressing a tight brass cleaning brush with cleaning rod trough the barrel and measure the length you have to push the rod until it has rotated one revolution.

1" (inch) = 25,4 mm