AB Quantum Bullet Library Listing Question for AAC 77 Grain OTM

[Snarf]

A friend bought these bullets for some range fun. https://palmettostatearmory.com/aac-5-56-nato-ammo-77-grain-otm-20rds-v2.html
Not ideal ammo for sure, but he uses it and wants to get dope. He has never shot past 100 yards with a 5.56 rifle before, and wanted to do so with this (he bought a lot shipped to our private range).

I was going to create an AB Quantum profile with the location details of where we will be shooting and his rifle with what I expect will be close to his MV. I will true it up with an Athalon before we step past 100. In so doing, I realized this bullet made in conjunction with Hornady is nor listed in the library that I can see.

Does anyone know the actual bullet used in this from the bullet library?

I know I can plug in the listed G1, but I would prefer to find the actual bullet used in these for AAC from Hornady if possible.

Thanks!

 

[padom]

Probably the new Hornady 77 Aeromatch. Its such a new bullet you'll have to wait them to fully test it and add it to their bullet library. Its not on JBM Ballistics yet either.

Your only option is to take measurements and input G1 or G7 and actual velocity and just true it at distance. Im sure using 77smk will get you very close.

How we did it for many many years anyway.

 

[BobinNC]

Mid-South lists this bullet . I've confirmed with them that this 77 grain offering is made by Hornady. Item # 004-HMK22477. The G1 and G7's sound about right.

• Ballistic Coefficient: 0.355 (G1)
• Ballistic Coefficient: 0.179 (G7)

Classic Match 22 Caliber 224 Diameter 77 Grain Boat Tail Hollow Point With Cannelure

 

[Snarf]

Mid-South lists this bullet . I've confirmed with them that this 77 grain offering is made by Hornady. Item # 004-HMK22477. The G1 and G7's sound about right.

• Ballistic Coefficient: 0.355 (G1)
• Ballistic Coefficient: 0.179 (G7)

Classic Match 22 Caliber 224 Diameter 77 Grain Boat Tail Hollow Point With Cannelure

PSA on that listing has the G1 at .362 on that listing. We sure this is the same bullet?

 

[BobinNC]

PSA on that listing has the G1 at .362 on that listing. We sure this is the same bullet?

I'm not sure of anything. I provided the best information I have. If the AAC 77 gr OTM is indeed made by Hornady then that is the information I was provided. The difference of 0.007 between 0.355 & 0.362 is nothing of any note that a shooter could easily discern.

If it's not the Hornady bullet in use by AAC in the 77gr OTM, I don't know what to tell you, but I doubt the G1 and G7 are as good as the current 77 Gr SMK @ G1 0.372 & G7 0.182.

 

[Snarf]

In case anyone wants an answer to this like I did, I spoke to the ballistics engineer at Hornady. He confirmed it is in fact a totally different bullet than what is in their catalog. The BC is the listed G1 on the site selling it at .362.

 

[RegionRat]

With your muzzle velocity and that BC, you should be okay.

That should get you close enough to make corrections for the Density Altitude and temperature of the day.

We used an old rule of thumb to get most battle rifles on paper.

2, 2, 3, 3, 4, 4,

Muzzle to 100 is 2 MOA, 100 to 200 is 2 MOA,
200 to 300 is 3 MOA, 300 to 400 is 3 MOA,
400 to 500 is 4 MOA, and 500 to 600 is 4 MOA

It wasn't perfect. It was easy to remember and has worked well enough hundreds of times to put just about anything within reach of adjustment.