Posted: 5/30/2015 3:18:25 PM EDT
| I've seen Mark and Sam after work on youtube get it out to 2000. Anyone do better or know that it can? |
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My ballistics program says 1450 yards is where the bullet goes subsonic. Quoted:
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That surprises me, I figured it would destabilize about 1500 to 1600 yards. My ballistics program says 1450 yards is where the bullet goes subsonic. How much powder to push it that far? Didn't think 243 would go past 1000 yrds |
| All depends on which bullet you're talking about (HUGE variety in this caliber), the barrel twist, etc. Also, "subsonic" and "destabilized" are two different things. People too often assume that, just because a bullet goes subsonic, that it all the sudden starts tumbling. Not usually true. |
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Quoted:
How much powder to push it that far? Didn't think 243 would go past 1000 yrds Quoted:
Quoted:
Quoted:
That surprises me, I figured it would destabilize about 1500 to 1600 yards. My ballistics program says 1450 yards is where the bullet goes subsonic. How much powder to push it that far? Didn't think 243 would go past 1000 yrds Just inside the same limit of pressure with a long barrel and slow burn rate powder. |
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Heres my data dropped into JBM Red indicates my transonic shift ive only had it to 1050yd and actual dope was 27.2moa
Output Data Elevation:3.976 MOAWindage:0.000 MOA Atmospheric Density:0.07647 lb/ft³Speed of Sound:1116.4 ft/s Maximum PBR:371 ydMaximum PBR Zero:316 yd Range of Maximum Height:176 ydEnergy at Maximum PBR:1291.7 ft•lbs Sectional Density:0.254 lb/in² Calculated Table RangeDropDropWindageWindageVelocityMachEnergy Time LeadLead (yd)(in)(MOA)(in)(MOA)(ft/s)(none)(ft•lbs)(s)(in) (MOA} 0 -1.8 *** 0.0 *** 3050.0 2.732 2168.5 0.000 0.0 *** 100 0.5 0.4 0.6 0.6 2853.5 2.556 1898.0 0.102 17.9 17.1 200 -1.6 -0.8 2.4 1.2 2663.2 2.385 1653.3 0.211 37.1 17.7 300 -8.6 -2.7 5.7 1.8 2479.8 2.221 1433.5 0.327 57.6 18.3 400 -21.2 -5.1 10.4 2.5 2303.6 2.063 1237.0 0.453 79.7 19.0 500 -40.4 -7.7 16.9 3.2 2135.1 1.912 1062.6 0.588 103.5 19.8 600 -67.3 -10.7 25.4 4.0 1973.9 1.768 908.3 0.734 129.2 20.6 700 -103.0 -14.1 35.9 4.9 1819.1 1.629 771.4 0.893 157.1 21.4 800 -149.4 -17.8 48.9 5.8 1670.1 1.496 650.2 1.065 187.4 22.4 900 -208.2 -22.1 64.6 6.9 1526.5 1.367 543.2 1.253 220.4 23.4 1000 -282.0 -26.9 83.6 8.0 1388.6 1.244 449.5 1.459 256.7 24.5 1100 -373.9 -32.5 106.3 9.2 1257.5 1.126 368.6 1.686 296.7 25.8 1200 -487.8 -38.8 133.2 10.6 1135.5 1.017 300.6 1.937 340.9 27.1 1300 -628.7 -46.2 164.4 12.1 1054.2 0.944 259.0 2.213 389.5 28.6 1400 -800.9 -54.6 198.4 13.5 1010.4 0.905 238.0 2.504 440.7 30.1 1500 -1007.1 -64.1 234.4 14.9 975.0 0.873 221.6 2.807 494.0 31.5 1600 -1250.1 -74.6 272.3 16.2 943.2 0.845 207.4 3.121 549.2 32.8 1700 -1532.3 -86.1 312.0 17.5 913.8 0.818 194.7 3.445 606.3 34.1 1800 -1856.4 -98.5 353.6 18.8 886.1 0.794 183.0 3.780 665.2 35.3 |
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Right tool for the right job. If you are shooting 2000 yards the .243 shouldn't be on your radar for a caliber. Yes it will get out there and fall in subsonic but much better calibers to do it. I know people just like pushing the boundaries but it shouldn't be taken as an effective range by any means.
The .243 is an excellent round when loaded properly for long range like George does and even with a little less velocity. I used to shoot mine at around 3000fps with the 115s and they worked great to 1200 in matches. |
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I believe George Gardner is running 115gr Moly DTAC bullet with a 0.585 BC at around 3,150 FPS. That means he is supersonic up to about 1,600 yards. A great shooter can hit 2,000 yards with that load. was JLK last time i talked to him with a good bit higher bc |