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1500yd .308 hits

ScottyS

ScottyS

Now with more M40A1
Full Member
Minuteman
Oct 15, 2004
243
8
Reno, NV
#1
Here's a very short video of a couple rounds at 1500yd with a .308. Sorry I didn't make a dual-cam vid this time, but I really wasn't planning on taking footage. Basically, I had a few rounds from a lot I loaded for the last NC TBRC left over that I needed to get rid of, and a family outing seemed a good time to do it.

http://www.youtube.com/watch?v=DwYgShOV35E&feature=channel_page

Enjoy!
 
#6
Re: 1500yd .308 hits

R700 action, heavy lug, 22" Mike Rock 5R barrel, .308 Win Match chamber, M40A1 return stock, modified M70 bottom metal, TPS 20MOA base & rings, gunsmithing by Randy Cain at R+D, 100mph tape cheek, Eagle stock pack, tuned R700 trigger.

155gr Lapua Scenar, Varget, Lapua case, Fed 210M. 2.810" OAL, waaay off the lands. 2940fps. Redding full-length bushing die, Forester BR seater, loaded on an old Hollywood.
 
#8
Re: 1500yd .308 hits

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: ScottyS</div><div class="ubbcode-body">R700 action, heavy lug, 22" Mike Rock 5R barrel, .308 Win Match chamber, M40A1 return stock, modified M70 bottom metal, TPS 20MOA base & rings, gunsmithing by Randy Cain at R+D, 100mph tape cheek, Eagle stock pack, tuned R700 trigger.

155gr Lapua Scenar, Varget, Lapua case, Fed 210M. 2.810" OAL, waaay off the lands. 2940fps. Redding full-length bushing die, Forester BR seater, loaded on an old Hollywood. </div></div>

Nice shooting! How much Varget?
 
#19
Re: 1500yd .308 hits

Just for kicks, here is JBM's idea:

Trajectory
Input Data
Manufacturer: Lapua Description: Scenar (Litz)
Caliber: 0.308 in Weight: 155.0 gr
Muzzle Velocity: 2940.0 ft/s Distance to Chronograph: 10.0 ft
Sight Height: 2.10 in Sight Offset: 0.00 in
Zero Height: 0.00 in Zero Offset: 0.00 in
Windage: 0.000 MOA Elevation: 0.000 MOA
Line Of Sight Angle: 0.0 deg Cant Angle: 0.0 deg
Wind Speed: 10.0 mph Wind Angle: 90.0 deg
Target Speed: 10.0 mph Target Angle: 90.0 deg
Temperature: 90.0 °F Pressure: 29.92 in Hg
Humidity: 25.0 % Altitude: 4600.0 ft
Vital Zone Radius: 5.0 in
Std. Atmosphere at Altitude: No Pressure is Corrected: Yes
Zero at Max. Point Blank Range: No Target Relative Drops: Yes
Mark Sound Barrier Crossing: No Include Extra Rows: No
Round Output to Whole Numbers: No
Output Data
Elevation: 3.992 MOA Windage: 0.000 MOA
Atmospheric Density: 0.06062 lb/ft³ Speed of Sound: 1149.4 ft/s
Maximum PBR: 370 yd Maximum PBR Zero: 314 yd
Range of Maximum Height: 176 yd Energy at Maximum PBR: 1930.2 ft•lbs
Sectional Density: 0.233 lb/in²
Calculated Table
Range Drop Drop Windage Windage Velocity Mach Energy Time Lead Lead
(yd) (in) (MOA) (in) (MOA) (ft/s) (none) (ft•lbs) (s) (in) (MOA)
0 -2.1 *** 0.0 *** 2945.5 2.563 2985.5 0.000 0.0 ***
500 -42.5 -8.1 14.5 2.8 2182.5 1.899 1639.1 0.592 104.2 19.9
1000 -273.3 -26.1 68.9 6.6 1539.3 1.339 815.4 1.410 248.2 23.7
1500 -894.0 -56.9 189.9 12.1 1067.7 0.929 392.3 2.607 458.8 29.2
01/09/09 20:21, JBM/jbmtraj-5.0.cgi
 
#21
Re: 1500yd .308 hits

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: MontanaMarine</div><div class="ubbcode-body">Great shooting! thanks for sharing that vid. </div></div>

You bet Shane, good to hear from ya!
 
#23
Re: 1500yd .308 hits

Great shooting Scotty!
I'm curious...
Did you use the JBM output 'as is' with my BC to get your dope, or did you have to 'tweak' anything to make the hits?
If it's that accurate (56.9 vs 57 MOA) at 1500 yards, that's awesome (I may want to point to your shooting as an example of how accurate the ballistics are)! If you had to tweak it, I'm interested in what the tweak was (and I'll get back to work to make it better
smile.gif
).
Thanks,
-Bryan
 
#24
Re: 1500yd .308 hits

I used Adobe Premier, and I didn't spend any time making it nice, obviously.

Bryan, no, I ran the JBM afterwards in response to a question about drop. However, JBM has always been very accurate. You do need to know the correct BC of the bullet, the Lapua has more than one BC that people have attached to it......

I usually use FFS software, which has the features I like. It's awesome with known bullets like the Sierra and stuff, but the Lapua factory BC's are not always correct, and so I've had to prove the load in given conditions and range and then recalc the BC and/or DK in FFS before being able to rely on it.

My dope for the TBRC this year from FFS was spot on to 1k, once I had done those operations.
 
#25
Re: 1500yd .308 hits

Scotty. That's certainly impressive shot for a 308 caliber in any body's book. I was just wondering when you look at the target itself, do you see any key-hole imprint on that, since you are well into the subsonic territory for the 155 scenars.
 
#26
Re: 1500yd .308 hits

Nope, straight hits. Actually, depending on which ballistics you run, it might not have been subsonic for long.

Also, when I've shot the 175 SMK's at 1200yds from a 20" tube, they hit straight as well.

Interestingly enough, we also shot a few 168 SMK's with 41gr IMR 4895 LC brass at a plate at 1065yds, using a 16" Armalite AR-10 and Leupold M3. Not only was it repeatable, but the hits also looked straight, which surprised the heck out of me. Every time that I've been in the pits and someone is shooting a slower 168, it keyholes.
 
#38
Re: 1500yd .308 hits

id ask you what the group size was, but that would break the 5 shot group rule
whistle.gif


good thing you got it on video, that would sound like an awfully tall tale without the evidence
 
#48
Re: 1500yd .308 hits

Good shootin'! I'm hoping I can get some long range (1200y) shooting in soon, but the weather is just too darn cold for these parts.

Dumb question about the 168's maintaining their stability against what was thought to have happened, could a faster twist make the 168's stable through the transition to subsonic vs. the slower 1:12 twists? I shoot 208's right now, but thinking of making a switch to the lighter bullets, can't make up my mind.

Branden
 
#49
Re: 1500yd .308 hits

GCM, welcome to the 'Hide!

Branden, the Sierra 175 is known to remain stable past the transonic stage in many barrels, I suggest you try them. The 168 was just not designed for anything past short-range competitions.
 
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