Not sure if this will help for real world results vs stated info, but I would use the lower stated BC and here's why.....
I recall others a few years back saying AMAX needed to use lower BC for drop calc so I used that for the base BC which was said to use 0.42.
The trajectory didn't line up and I did do proper scope center to bore measurement. There could have been an error on my part somewhere, but I didn't look into it and just used the real world results as calc values to me are a starting point to get close and then map actual real world data, re-plot from there.
22" barrel. AMAX chrono'd pretty close around 2510 fps and my origial cal value I put 2500 before I had chrono data. 100 yd zero.
300 yds called for 4.82 MOA, I was 7 MOA. 500 yds called for 12.73 MOA (mine is 1/4 MOA increments) and 12.75 did perfect. This was the furthest I used AMAX for, I don't recall if 750 yds or not so I'll just say not.
Finally ran out of my AMAX stockpile and used the ELD last week or week before and don't recall that fps off the top of my head, but I think the ones tested from this batch was a tad faster than AMAX. (all factory loads here)
I have new actual values written down and I'd have to dig. But I recall 500 yds changed to 15 MOA. 750 yds my old calc for AMAX stated 26 MOA, but I dialed to 29.75 MOA and lucky chance that was the required adjustment. 29/30 hits on the gong. I thought I would try to dial in better by 1/4 MOA about 3 rds in and that was the miss, went back to 29.75 and kept banging.
I recall others a few years back saying AMAX needed to use lower BC for drop calc so I used that for the base BC which was said to use 0.42.
The trajectory didn't line up and I did do proper scope center to bore measurement. There could have been an error on my part somewhere, but I didn't look into it and just used the real world results as calc values to me are a starting point to get close and then map actual real world data, re-plot from there.
22" barrel. AMAX chrono'd pretty close around 2510 fps and my origial cal value I put 2500 before I had chrono data. 100 yd zero.
300 yds called for 4.82 MOA, I was 7 MOA. 500 yds called for 12.73 MOA (mine is 1/4 MOA increments) and 12.75 did perfect. This was the furthest I used AMAX for, I don't recall if 750 yds or not so I'll just say not.
Finally ran out of my AMAX stockpile and used the ELD last week or week before and don't recall that fps off the top of my head, but I think the ones tested from this batch was a tad faster than AMAX. (all factory loads here)
I have new actual values written down and I'd have to dig. But I recall 500 yds changed to 15 MOA. 750 yds my old calc for AMAX stated 26 MOA, but I dialed to 29.75 MOA and lucky chance that was the required adjustment. 29/30 hits on the gong. I thought I would try to dial in better by 1/4 MOA about 3 rds in and that was the miss, went back to 29.75 and kept banging.