Home Forums Reloading Big Game Rifles Manufacturers listed BC reliability ???

Anyone Checked these to see how close they are to reality ??
As listed for 0.284 bullets:

Nosler....160 PT........0.475
Nosler....160 AB........0.531
Hornady 162 A-Max...0.625

I can't give you math, but have shot all three from the 7mm Mashburn Super started at 3170-3200 fps,from my rifle and my friends as well. My rifle has a 6x36 with LR dots,and the reticle gets all three to 600 yards.

The Amax is zeroed 2.5" high at 100 yards.The 160 NPT impacts 1/2" higher. At distances from 300 to 600 yards,the two bullets group together.There is virtually no difference between the 160 AB and the 160 NPT.

It's easy to see that the 162 Amax is the flattest shooting of the three bullets. I had Jordan Smith run the numbers on all this for me and he confirmed the 162 Amax beats the Partition by about 1/2 MOA to 600 yards. I'm sure the bullet will continue to show that advantage as range increases.

For wind drift you'll have to look at the tables. I have seen drift at 500-600 yards from all three but really can't quantify it for you.But the 162 Amax seems to have "eyes",and I have had it slam home under conditions I thought for sure I would see more drift. Great bullet but I have never killed anything with it.

The way that I understand it, BC varies constantly, depending upon such things as the distance the bullet has traveled, the speed at which it is traveling, the twist of the barrel it exited, the temperature, humidity, degree of overcast, angle of the Earth's axis, moon phase, height and weight of the shooter, number of angels currently dancing upon the heads of pins, the Dow Jones, the exact population of Gheen, MN at that moment, and the current winning percentage of the third-place team in the American League West (or the percentage when the season ended if they are between seasons). Can anyone correct any errors that I made?

Nope, pretty much covers it.

Those G1 BC numbers are fine for comparison, but are the high velocity range numbers, and are an approximation to begin with.

The closest G1 BC numbers you will find to "reality" are G1 numbers that are adjusted for velocity, or, better yet, G7 BC numbers because G7 uses a bullet shape that is closer to these bullet shapes. Many manufacturers make G7 available.

Most calculations are better served using G7 BC. Once you are able to plug in a few verified trajectory figures at a few different ranges, measured g7 that is fine-tuned with some range results is more accurate.

G7 is especially useful with Berger VLDs. Check out the Berger manual for details.

I use Bryan Litz's BC values. I then verify at a range for two distances. In my case it is at our silhouette range 300 and 500 M. Comeups have matched Bryan's numbers in nearly all of the bullets I tried. I use G7 with boattails.

162 A-max .599 (G1) .307 (G7)

160 accubond . 476 (G1) .244 (G7)

Don't know about the Pt.

It seems like I saw a list of Bryan's numbers online somewhere. I'll see if I can find it when I get a chance.

I use Litz's data as well with excellent results.

5sdad, Hummmm !!!! should be pretty EASY to calculate & work with then.... if you are a physics genius.

Thanks tons for the input.

Putting up a separate post asking if anyone has killed animals with the A-Max and what their evaluation of its performance is.

An interesting read:

http://arxiv.org/ftp/arxiv/papers/0705/0705.0389.pdf

M1garand, Indeed it is.