|
Forums46
Topics537,799
Posts9,729,296
Members87,042
| |
Most Online25,604
Feb 12th, 2024
|
|
|
 ACOG TA01 with 75 grain ammo
#6110545
12/31/15 01:57 AM
|
Joined: Jan 2012
Posts: 778
magspa
OP
Tracker
|
|
OP
Tracker
Joined: Jan 2012
Posts: 778 |
Any ar gurus here? I got a TA01 at a great price..problem is i like those hornady superperformance 75 grain HP's. They are pretty fast for 75grain (2910 fps) but the optic bdc is caliberated for the 55 grain ammo in a 20" barrel. Im putting it on a 16" 1:7 twist. How far off do you think the bdc will be?
|
|
|
|
Re: ACOG TA01 with 75 grain ammo
[Re: magspa]
#6110556
12/31/15 02:01 AM
|
Joined: May 2015
Posts: 4,140
Dalee7892
Extreme Tracker
|
|
Extreme Tracker
Joined: May 2015
Posts: 4,140 |
Pull up the info for the ballistics on each round from mfg. compare the drop for each distance.
|
|
|
|
Re: ACOG TA01 with 75 grain ammo
[Re: magspa]
#6110853
12/31/15 04:31 AM
|
Joined: Jan 2011
Posts: 46,950
Gravytrain
THF Celebrity
|
|
THF Celebrity
Joined: Jan 2011
Posts: 46,950 |
What kind of yardage are you talking about using the reticle out to?
Upon us all, upon us all, a little rain must fall
|
|
|
|
Re: ACOG TA01 with 75 grain ammo
[Re: Dalee7892]
#6110974
12/31/15 11:33 AM
|
Joined: Jan 2012
Posts: 778
magspa
OP
Tracker
|
|
OP
Tracker
Joined: Jan 2012
Posts: 778 |
Pull up the info for the ballistics on each round from mfg. compare the drop for each distance. I pulled them and they are very similar actually. The 75grain has more velocity after 200yards.
|
|
|
|
Re: ACOG TA01 with 75 grain ammo
[Re: magspa]
#6111082
12/31/15 01:32 PM
|
Joined: Mar 2012
Posts: 3,809
Cleric
Extreme Tracker
|
|
Extreme Tracker
Joined: Mar 2012
Posts: 3,809 |
Is the velocity from your gun or printed on the box? That velocity seems really high...
Put your velocity into a drop calculator than go to trijicons web site and look up the spacing on the reticle
|
|
|
|
Re: ACOG TA01 with 75 grain ammo
[Re: magspa]
#6111188
12/31/15 02:27 PM
|
Joined: Jan 2012
Posts: 778
magspa
OP
Tracker
|
|
OP
Tracker
Joined: Jan 2012
Posts: 778 |
Those are the manufacturer printed numbers.
|
|
|
|
Re: ACOG TA01 with 75 grain ammo
[Re: magspa]
#6111500
12/31/15 05:03 PM
|
Joined: Mar 2012
Posts: 3,809
Cleric
Extreme Tracker
|
|
Extreme Tracker
Joined: Mar 2012
Posts: 3,809 |
So for ideal data you need velocity from you barrel. The Hornady data is out of a 24in barrel
|
|
|
|
Re: ACOG TA01 with 75 grain ammo
[Re: magspa]
#6111923
12/31/15 09:14 PM
|
Joined: Mar 2012
Posts: 3,809
Cleric
Extreme Tracker
|
|
Extreme Tracker
Joined: Mar 2012
Posts: 3,809 |
If this data on sub tension is right...
100m 0"
200m 1.5'
300m 4.5'
400m 8.0'
500m 12.75'
600m 18.75'
Assuming 200 fps lost for 8 inches your velocity should be 2700 off published data with 2.5in offset for scope
1.5 is 200 yards
4.5 is approx 320
8 is approx 425
12.75 is approx 530
Ymmv
|
|
|
|
Re: ACOG TA01 with 75 grain ammo
[Re: magspa]
#6112129
12/31/15 11:14 PM
|
Joined: Jan 2012
Posts: 778
magspa
OP
Tracker
|
|
OP
Tracker
Joined: Jan 2012
Posts: 778 |
|
|
|
Moderated by bigbob_ftw, CCBIRDDOGMAN, Chickenman, Derek, DeRico, Duck_Hunter, hetman, jeh7mmmag, JustWingem, kmon11, kry226, kwrhuntinglab, Payne, pertnear, rifleman, sig226fan (Rguns.com), Superduty, txcornhusker
|
