as been said above..10 grns more powder for couple hundy FPS....so its 7mm/08 vs 280 308 Vs 30/06 243 vs 25 /06 all three Vs .270 you can hot up them bot hand keep the gap there but its not a huge gain...and the numbers quoted dont really give such a huge gain over much older cartridges using similar amounts of powder for similar valocity with similar projectile weights.
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