.300 AAC Blackout trajectory

[Grayrock]

Could anyone provide data on the above? I am using the Remington UMC 120gr OTFB (Supersonic) L300AAC1 cartridge, as it is readily available in my nearby stores. I built an AR and plan to gift it to a friend. In sighting it in I would find it helpful to know the drop at different ranges. I looked it up on the Remington website and it gives data for several different .300AAC loads, but not this one. So I emailed them and they replied with a link to the same chart I had already seen. So I emailed them back again describing what I wanted and then they replied with the ballistic coefficient of the bullet. I'm tired of them. So can anyone here point me to a source for this information? TIA

 

[badkarmamib]

If you have the BC of the bullet and the muzzle velocity, you can plug it into Federal's Ballistic App (free phone app or use their website)

 

[mavracer]

You're building AR's for other people and can't use a ballistic calculator?

 

[No4Mk1*]

I have hsed the ballistic calculator at handloads.com - to get you started I will estimate for you- use a BC of 0.29 and a sight height of 2.5"(Assuming AR) until you have the actual numbers. I'll leave muzzle velocity and altitude for you.

 

[bpshooter13]

JBM Ballistics is my go to calculator:
http://jbmballistics.com/ballistics/calculators/calculators.shtml

 

[Coltdriver]

I like the ballistic calculator at Hornady's web site. You can take the intervals and graph them on excel.

 

[GooseGestapo]

I'm shooting Speer 125gr TNT's and Nosler B.T.'s at 2,100+ fps wth 1-4x scope on flat-top reciever. I'm sighted 1.5" high at 100yds. Zero at ~150, 3" low at 200yds. Self imposed limit for hunting purposes.

 

[alientrainwreck]

I have always used Shooters Calculator. com you are gonna have to have the BC and velocity along with sight height it is fast and simple. It will also give you the maximum point blank range ( closest range to sight your rifle in at) along with a trajectory chart out to 1,000

 

[Grayrock]

You're building AR's for other people and can't use a ballistic calculator?

How does one use a ballistic calculator if one does not have the BC or the MV? Hence, the reason for my inquiry.

 

[Grayrock]

JBM Ballistics is my go to calculator:
http://jbmballistics.com/ballistics/calculators/calculators.shtml

Thanks for the link. I looked at several and liked yours the best. I found the info I needed accidentally. I was at Academy and they sell a Freedom Bucket of Bullets of the kind I was using and it had all the necessary info on the bucket. Why couldn't Remington give me that info?

 

[mavracer]

How does one use a ballistic calculator if one does not have the BC or the MV?

You stated in your OP that Remington had already supplied you with the BC and MV shouldn't be that hard to find took me exactly one website Midwayusa to find the listed MV as 2202.

 

[1stmarine]

IMO there is no much value in ballistic charts for this type of trajectories.
I would not complicate things a lot for pistol calibers and close ranges.
If you look at many pistol calibers they all are pretty similar like the 357 magnum or 30 carbine shot from carbines so the same will work for the whisper/blackout.
If you zero at 75 yards you are looking at POI withing one inch at 50 to 100 and 3-4" low 150 yards that one can easily hold over.
Longer ranges than 125, 150yards tops do not make a lot of sense other than playing games.

 

[Grayrock]

Thank you for suggesting MidwayUSA. I had checked several other sites to no avail. I shall endeavor to remember Mr. Potterfield's site in the future.

 

[Ibmikey]

Goose Gestapo, Regarding your 125 gr TNT bullets, supersonic, the baby 350# Hog in the photo ate one in the LF shoulder and decided to just give up. That is a AAC 300 Blackout Handi Rifle and no bullet drop calculated as he emerged from the woods about sixty yards away. Love the BO but only to ranges of a hundred fifty yards or less.

 

[bangswitch]

Without doing all the ballistic math,my BLK loads of A1680 @ 21.5 grains (a compressed load, BTW) pushing 155 SMK Palmas hit 4 inches lower at 300 yards than they do at 100 yds, with a 100 yd. zero. MV chrono's around 2070 fps from my 16" barrel. The listed BC is .470 for these at the MV I'm getting.

 

[wild willy]

You are saying dead on at 100 yds you are only 4 inches low at 300.I'd have to see that.

 

[1stmarine]

You are saying dead on at 100 yds you are only 4 inches low at 300.I'd have to see that.

I saw the error too. He was probably referring to 150yards.
Beyond that we get into Tokarev speeds and they head straight to the ground.

Your Input Variables
Ballistic Coefficient 0.470 Velocity (ft/s) 2070 Weight (grains) 155
Maximum Range (yds) 500 Interval (yds) 50 Drag Function G1
Sight Height (inches) 1.5 Shooting Angle (degrees) 0 Zero Range (yds) 100
Wind Speed (mph) 0 Wind Angle (degrees) 90 Altitude (ft) 0
Pressure (hg) 29.53 Temperature (F) 59 Humidity (%) 0.78
Ballistics Results
Range (yards) Velocity (fps) Energy (ft.-lb.) Trajectory (in) Come UP in MOA Come UP in Mils Wind Drift (in) Wind Drift in MOA Wind Drift in Mils
Muzzle 2070 1475 -1.5 0 0 0 0 0
50 1988 1360 0.4 -0.7 -0.2 0 0 0
100 1908 1253 0 0 0 0 0 0
150 1830 1152 -2.7 1.7 0.5 0 0 0
200 1754 1059 -8.1 3.9 1.1 0 0 0
250 1681 973 -16.3 6.2 1.8 0 0 0
300 1611 893 -27.5 8.7 2.5 0 0 0

 

[crazysccrmd]

Without doing all the ballistic math,my BLK loads of A1680 @ 21.5 grains (a compressed load, BTW) pushing 155 SMK Palmas hit 4 inches lower at 300 yards than they do at 100 yds, with a 100 yd. zero. MV chrono's around 2070 fps from my 16" barrel. The listed BC is .470 for these at the MV I'm getting.

For that drop you'd have to be shooting that bullet at a muzzle velocity of close 4300fps. Either you have one badass 300BO or you were shooting nowhere near 300yds.

 

[jmorris]

with a 100 yd. zero. MV chrono's around 2070 fps from my 16" barrel. The listed BC is .470 for these at the MV I'm getting.

At 6000 ft above sea level and 59 deg F, with a sight height 1.5" above the bore, you would be closer to -7.8 at 200 yards and -26" at 300 with the bullet traveling just shy of 1700fps. Only about 2 feet off though.

 

[bangswitch]

Guys, there should be a 2 in front of the 4, I missed that one big time. Yeah, that 300BLK is bad-ass, all right.

I'm shooting a 30 inch steel plate at 300 yards, using a 1x red dot sight with a 3 MOA dot. I have it zero'd at 100 yards, where I usually shoot paper, but I often start banging at the steel plate at our 300 line. If I aim at the steel ring it's hanging from, I'm hitting the lower 1/4 of the plate about 8 out of ten times.

 

[Forsaken]

I'm shooting Speer 125gr TNT's and Nosler B.T.'s at 2,100+ fps wth 1-4x scope on flat-top reciever. I'm sighted 1.5" high at 100yds. Zero at ~150, 3" low at 200yds. Self imposed limit for hunting purposes.

i have about the same results with the ammo you have mention. "L300AAC1"