I see low .3s published but even then, if we assumed .370 was the norm, the round is slower and that negates BC advantage. Resulting performance is the same as far as exterior ballistics are concerned. Nothing special about 5.45. It’s just a 5.56 from a different part of the world.
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I did post the drop chart
That’s why I was inquiring how much flatter people were claiming with 5.45. The numbers are indistinguishable. Any perceived “flatbread” with 5.45 AKMs va an AR can be attributed to the AR’s height over bore rather than actual trajectory. That’s why I set them both the same with the ballistic calculator. When we shoot 7N6 out of the 5.45, it’s got just a bit more drop than the 5.56 rifles with 14.5” barrels. The 5.45 AR is a 16”. They are sighing four inches of each other at 300.
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