300blk drop ?'s

[Makaio]

I am placing the question in this forum because I know people are going to tell me that the round is not effective at long distances. I know this, but would like to see if anyone has ever pushed it out there.

I have an AAC MPW 300blk with 16" barrel 1:7 twist, and I'm using the 208gr hornady amax. I want to be able to shoot semi-accurately out to about 300yds. This gun will have a nightforce moar scope and will be used for coyote hunting. I am using this round because I do not have access to supersonic 300blk at this time, but have a several hundred of subsonics.

Question: Has anyone ever attempted this and did you record the bullet drops at distances past 200yds?

Thanks in advance for any help that can be given!

 

[darth_ritis]

I also have a 16" barrel 1:7" twist (CMMG) on my 300blk rifle. I started loading up some 190gr Bergers but I haven't had a chance to shoot them yet so I don't have any dope for you. I am also curious how the accuracy will be to a max 300 yards. If only it would stop wintering outside ...

..oO( I wish I could find A-Max bullets in stock )

 

[dddoo7]

It can be done. Drop is similar to a .22lr, but the blkout will have much more energy. The difficult thing (same as with .22) is that you will need to know your dope for about every 5-10 yards as you near 300 yards. If you are off by much more than that you will miss the coyote entirely. A good range finder is necessary unless you are shooting static targets.

 

[rjacobs]

Plug numbers into JBM and it will tell you the drop.

With a 50 yard zero and using standard atmosphere(29.92, 59 degrees) and 1050fps I get the following inches(mil's):
100 yards: -6.4(1.9 mils) 1030FPS
200 yards: -21.8(6.3 mils) 980FPS
300 yards: -38.4(11.2 mils) 952FPS
400 yards: -55.9(21.6 mils) 925FPS

So while velocity seems to stay pretty decent you are trading velocity for drop. With my setup I could only shoot to 300 yards just using my dials.

 

[Makaio]

according to hornady the drop at 200yds is -31.2" w/ a 100yd zero. a buddy has a golf course and i'll probably zero in and create a drop chart out to 325. it'll be rough as the cold temps and snow in NE ohio aren't my favorite conditions to do anything but lay on the couch.

 

[Makaio]

..oO( I wish I could find A-Max bullets in stock )

Several stores have a few boxes in stock here, but price ranges from $32-37 a box plus tax. I'm actually trying to find some umc supersonics. When they're in stock they're about $15-$18 a box.

 

[darth_ritis]

I ran some numbers with supersonic bullets, just for comparison.

125gr Nosler BoatTail @ 2000fps MV, 50 yard zero, using last range weather of: 5164ft Alt, 29.58" Hg, 49.6F, 48% Humidity, Wind 4.9 mph from 160 degrees

100 yards: -0.16 (-0.04mil) 1833 fps 933 ft-lbs
150 yards: -2.91 (-0.54mil) 1750 fps 850 ft-lbs
200 yards: -8.50 (-1.18mil) 1671 fps 774 ft-lbs
250 yards: -17.20(-1.91mil) 1594 fps 705 ft-lbs
300 yards: -29.33(-2.72mil) 1520 fps 642 ft-lbs

Impressively less drop and more energy than any of the subsonic rounds I charted. I'm sure you're wanting subsonic for hunting for noise reasons, but I find this an interesting comparison anyway.

 

[Makaio]

I am more than content with the sound reduction of supersonic ammo with my can, if I could find some supersonic ammo at a good price. With the subsonic 300blk however it is ridiculously quiet.

 

[darth_ritis]

Are you shooting factory ammo with the 208 Amax? I assumed you were reloading, in which case you could load whatever you want.

 

[Makaio]

Yes. Factory ammo. Would prefer to load, just can't find the time to

 

[CowboyBart]

Don't let any one talk down about the energy. With a 200gr Sierra it will have enough energy to anchor an antelope at 185 yds. That was with a 16" Contender barrel.

 

[ollie]

A friend has stretched his blackout to 600yd on groundhogs.

 

[Makaio]

Anyone have their blk dialed in for 208gr Hornady Amax factory loads that would like to share?