View Full Version : ACOG Dead on with 69 grain SMK's 600 yards
markm and I were doing some long range shooting with our 308's saturday so I thought I would pull out my AR to ping the steel a little. I was running a Colt 6940 with a 4X ACOG with Cross hairs. I also topped it off with a AAC M4-2000 which makes hearing that light tink of 69 grains more audible.
Anyway, at 300-400-500-600 we were hitting the steel repeatedly. The crosshairs were perfect and it was pretty cool to see it work so well. Also, the way we had the spotting scope set up, we were able to see every bullet flying in for POI. Some days it works out pretty good.
FYI, those 69grainers were probably running 2700fps.
ICANHITHIMMAN
10-09-11, 19:07
What model ACOG is it? Do you mean you have the LAPD rectical?
Not sure what reticle it was... but that ACOG and Colt were crapping me out when shooting against our REM 7 hundos. :(
If it's the 4x cross-hair version, it's likely a TA01 in one form or another. There's a video of me somewhere with my AR & ACOG duking it out at 600yds with some 700's. That was a good day :D
Put an M855 Green Tip Ball bullet next to a Sierra 69 Match King. Notice the similarity in bullet shape?
https://www.ar15.com/media/mediaFiles/18978/M855-69SMK_jpg-2781946.JPG
What model ACOG is it? Do you mean you have the LAPD rectical?
TA31RMR , I think. 4X32.
I like the 3.5X35 the best. My 3.5'd haver the Red Chevron. I also noticed they calibrate pout to 800 yards, not that 600 wasn't plenty.
I hit the 400 yard plate with the red dot. I had to hold over to where I could barely see the plate under the massive red blur. Interesting to see what you can do, if you were in a pinch though.
Put an M855 Green Tip Ball bullet next to a Sierra 69 Match King. Notice the similarity in bullet shape?
Interesting, I have some M855, I think I will take some next week and give it a Long Distance whirl. I really doubt it will offer the accuracy of Markus lasers. But should be cool to compare.
Put an M855 Green Tip Ball bullet next to a Sierra 69 Match King. Notice the similarity in bullet shape?
The ogive is different. I have to adjust my seating die to get SS109s in far enough. The 69 gr SMKs have an ogive close enough to 55gr FMJs that I can go back and fourth with no die adjustment.
I used a TA31F and 69gr SMK for competition out to 500yards in the past. Took a look of my old calculations, the difference is about 6"-7" at 500m, just about above a MOA. I loaded my SMK to fly out at 2850fps though.
ICANHITHIMMAN
10-10-11, 09:07
Put an M855 Green Tip Ball bullet next to a Sierra 69 Match King. Notice the similarity in bullet shape?
Dont suppose you know the BC of SS109? I want to compaire the bullets.
What twist rate and length of barrel are you running?
I have a TA31 atop my 14.5" perm flash hider, 1:9 twist. I load 24 grains behind a 55 grain FMJBT(which yields me about 2800fps) and I can hit a 12"X12" steel target usually 7 out of 10 times. I am very happy and surprised by its accuracy.
Colt 6940, colt barrel, 1/7 16 inch. It will shoot 1 inch groups with this ammo. The accuracy had been proven many times before, it was the accuracy of the calibration/BDC in the ACOG that surprised me.
ICANHITHIMMAN
10-14-11, 09:31
Colt 6940, colt barrel, 1/7 16 inch. It will shoot 1 inch groups with this ammo. The accuracy had been proven many times before, it was the accuracy of the calibration/BDC in the ACOG that surprised me.
Yes me to, suprised and excited. I have some ss109, I think I will pull a bullet and compair it to a 69g SMK. This is one of the things I wish trijicon would do. They need a balistics calculator on there web page that lets you choose your rectical and the bullet your shooting enter your barrel lengh and twist rate an few other details and print a drop chart for your rifle. It would greatly expand the usable range of the ACOG models accrossed the feild.
Our load isn't running that hot. Only 2770 out of a USGI 20" barrel. We're running Max load of H322 which has a good accuracy reputation, but at the expense of a little velocity.
So as slow as our match kings are flying, it's interesting that the reticle is so accurate. :confused:
turdbocharged
10-14-11, 09:43
They need a balistics calculator on there web page that lets you choose your rectical and the bullet your shooting enter your barrel lengh and twist rate an few other details and print a drop chart for your rifle. It would greatly expand the usable range of the ACOG models accrossed the feild.
Agree 100%. Fantastic Idea.
Holy Smokes!
We took Pappa's 12.5 BCM suppressed and Shot it at 500, 700, and 800 yards yesterday.
500 yards was a walk in the park. 700 was very doable.... 800 was a challenge and at the outside edge of what a 12.5" gun will do for long range! :D
Holy Smokes!
We took Pappa's 12.5 BCM suppressed and Shot it at 500, 700, and 800 yards yesterday.
500 yards was a walk in the park. 700 was very doable.... 800 was a challenge and at the outside edge of what a 12.5" gun will do for long range! :D
Have you chrono'd the ammo you gents were using suppressed vs. unsuppressed? Wondering how much velocity gain you are seeing with the can, and then can assimilate if it's significant enough to make any real difference in regards to your LR accuracy.
An upcoming SDN-6 will be my first suppressor and I'm pretty green behind the ears when it comes this subject.
On a side note, you ladies need to take the damn training wheels off that little rifle at shoot it at some long ranges;)
The can bumps it 20 max, so not a huge amount but it does.
I have the SDN6 coming too. Just waiting on the stamp any day now. stamps are barely trickling in these days. I have two out.
I am going to run mine on the rem 5r and maybe the LMT MWS. AND i have a 12.5 6.8spc I may play a little with too.
Just dropped by my gun shop where I have a AAC Mini4 on back order since June- **** that. Whats up with AAC?
I left a message with the Owner, I either want my cash back for my mini4 or the 7.62 SDN in stock. So I might be getting a second 7.62 SDN, time will tell.
I have not fallen in love with the 6.8spc, but I have not really given it a chance either, maybe a 7.62SDN will bring that to life for me. It is traveling at 2,500+ out of my 12.5, so that gun might be cool to try and hit some longer range targets.
Until a couple of months ago, shooters in Washington state could own cans but it was illegal to shoot them--guys had to drive to Oregon or Idaho. Now that it's legal, everybody and his dog is in the market.
That may have something to do with the backlog...
Okie John
Our load isn't running that hot. Only 2770 out of a USGI 20" barrel. We're running Max load of H322 which has a good accuracy reputation, but at the expense of a little velocity.
So as slow as our match kings are flying, it's interesting that the reticle is so accurate. :confused:
damn Im running 2550 outta a 16in SS410 BCM Middy with 69 SMK handloads and I thought that was SLOW.
Interesting enough, my 55gr FMJBT load is 24.5grs of Varget, which is the same powder charge as my 69gr SMK load....
Interesting enough, my 55gr FMJBT load is 24.5grs of Varget, which is the same powder charge as my 69gr SMK load....
Yeah... we use the same H322 load for 55 and 69 grain for simplicity. This load is 1/10th off of MAX. I'm not messing with it AT ALL because it's so ridiculously accurate and stays super to 700 yards.
H322 is known for accuracy, but known for giving up some velocity for that accuracy.
yea, same here. I came up with these loads for 3gun, and both are 1in or slightly less at 100 with my 16in BCM SS410 middy and Burris XTR 1-4 I use for 3gun. Granted that was using a mechanical f-class rest so the gun was basically bolted to the bench.
Its amazing how similar a 55 FMJBT and a 69gr SMK fly. I just get my dope with the 69's and know my 55's are close enough out to 365 that it doesnt matter what I use. I keep the 69's for those windy matches where I want the extra bullet to buck the wind.
Im slowing showing these guys with 18 and 20in 3gun rifles that with a properly setup 16in, it will run just as smooth and accurate and is much lighter and more handy than a longer gun for the distances we shoot in the typical 3gun
I think a .304 G1 (off JBM).
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