longcruise
70 Cal.
Actually it’s not too far off. I was intrigued with the post so I plugged the values into my Ballistic Calculator. Using a 13 yard zero, a 50 cal at 1800 FPS with a 177gr LRB with a BC of .07 produces +1” at 25Y, +1.5” at 50Y, +1” at 75Y, and -1” at 100. It was also very close when I plugged the values in for 58 and 45 cal.
I think using 80gr of powder to generate 1800FPS may is too generalized, and could vary based on the particular powder and rifle/barrel.
Yes, the 1800 with 80 grains of powder is fleeting.
I disagree with the .07 BC though.