Table 1 - 6mm BR COAL and Bullet Seating Example Bullet


Bullet OAL in inches


105gn Berger BT


90gn Lapua Scenar


70gn Sierra MK


70gn Berger HP Varmint


55gn Nosler BST


1.198 1.102 0.823 0.853 0.673 0.713 0.739 0.607 0.627 0.786


Outside of case


COAL in inches


2.263 2.299 2.157 2.177 0.673


Base v Neck


+0.163 +0.051 - 0.096 - 0.086 - 0.199


Bullet shank


inside neck 0.312


0.276 0.156 0.226 0.055


Base v Neck is the bullet base’s position in relation to the bottom of the case-neck. + = extending below the neck into the shoulder area; - = base above the neck / shoulder junction. The ‘Shank inside Neck’ figure is the length of the bullet gripped by the neck, 0.312 inches being the maximum possible, 0.1 inches the minimum acceptable.


Table 2 - 6mm Match Bullet Ballistics 10mph 90° Crosswind Drift in Minutes of Angle Bullet


G7 BC


70gn Sierra MK 0.132 87gn Berger VLD 0.211 90gn Lapua Scenar 0.218 90gn Berger BT


0.210


95gn Sierra MK 0.232 95 Berger VLD


0.249


100gn Berger BT 0.246 105gn Lapua Scenar


105gn Berger BT 0.252 105gn Berger VLD 0.272 105gn Hdy A-Max 0.252 105gn JLK VLD


0.267


107gn Sierra MK 0.258 108gn Berger BT 0.262 115gn Tubb DTAC 0.276


MV 300yd 3,429 3.06 3,076 2.12 3,024 2.10 3,024 2.19 2,944 2.04 2,944 1.88 2,869 1.99


0.248 2,800 2.04 2,800 2.01 2,800 1.84 2,800 2.01 2,800 1.88 2,774 1.98 2,761 1.96 2,675 1.94


For Comparison (1): .308 Win Examples 155.5gn Berger BT 0.237 185gn Berger BTLR 0.283 185gn Berger Hybrid


208gn Hdy A-Max 0.324


3,050 1.88 2,796 1.77


0.291 2,796 1.72 2,637 1.67


3,000 1.36


600yd 7.69 4.83 4.76 5.00 4.60 4.21 4.45 4.58 4.49 4.08 4.49 4.18 4.42 4.37 4.31


4.23 3.90 3.77 3.63


For Comparison (2): .284 Shehane / 7mm SAUM Examples 175gn Sierra MK 0.327 180gn Berger Hybrid


0.345 2,950 1.32 Notes


6mm MVs all equate to 105gn at 2,800 fps. Wind drift is in MOA. D1,000 is retained velocity at 1,000yd G7 BCs from Applied Ballistics for Long Range Shooting by Brian Litz; ballistics results from Bryan Litz’s Applied Ballistics LLC Point Mass Ballistics Solver v2.0 PC program.


2.95 2.84


1,000yd 17.28 9.98 9.76


10.36 9.29 8.34 8.88 9.15 8.93 7.98 8.93 8.20 8.76 8.64 8.44


8.45 7.56 7.27 6.90


5.53 5.30


V1,000 916


(fps)


1,191 1,205 1,153 1,239 1,333 1,267 1,232 1,252 1,345 1,252 1,323 1,264 1,274 1,276


1,337 1,389 1,422 1,424


1,703 1,723


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