>>64150527
>>64150531
If bullet material density were kept constant, Indeed the 5.45 would eventually outpace 5.56 in energy, probably before 300 yards. Though 5.45 has ample ogive allocation, the shape isn’t all that great, and the bullet doesn’t even have a boat tail. If you loaded the 5.45 with a .220 version of picrel, however, that would be a different story. But 5.56 can not load such a fine bullet.
Picrel: 750gr .510 A-max. 5 cals long, 3 cal ogive. Should fit just fine in either the 5.45 or 5.56FABRL case without breaching COAL. According to BC figures I found, the i7 form factor is below 0.8.
