New 300 WM load for military VS 284 Winchester

[chrisj]

I have been curious of the ballsitics of the new 220/300 WM load. I was going to build a 284 Winchester for 1000+ yds, then thought twice after seeing the new 300 WM load. However...after running numbers, the 284 Win will equal or better ( depending on load) velocity, drift and energy up to 1500 yards, so why would I go with the 300 WM? All intelligent pros and cons are encouraged.

300 WM/220Calculated 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 -1.5 *** 0.0 *** 2855.1 2.557 3981.3 0.000 0.0 ***
100 1.6 1.6 0.5 0.5 2705.6 2.423 3575.3 0.108 19.0 18.1
200 -0.0 -0.0 2.1 1.0 2561.0 2.294 3203.5 0.222 39.1 18.6
300 -6.9 -2.2 4.8 1.5 2421.0 2.168 2862.8 0.342 60.3 19.2
400 -19.8 -4.7 8.7 2.1 2285.4 2.047 2551.1 0.470 82.7 19.7
500 -39.3 -7.5 14.0 2.7 2154.1 1.929 2266.3 0.605 106.5 20.3
600 -66.4 -10.6 20.8 3.3 2027.1 1.816 2007.0 0.749 131.8 21.0
700 -101.9 -13.9 29.2 4.0 1904.7 1.706 1771.9 0.901 158.6 21.6
800 -146.9 -17.5 39.3 4.7 1787.2 1.601 1560.0 1.064 187.3 22.4
900 -202.9 -21.5 51.4 5.4 1674.9 1.500 1370.2 1.237 217.8 23.1
1000 -271.3 -25.9 65.4 6.2 1568.6 1.405 1201.7 1.423 250.4 23.9
1100 -353.9 -30.7 81.8 7.1 1468.7 1.316 1053.6 1.620 285.2 24.8
1200 -452.6 -36.0 100.4 8.0 1376.3 1.233 925.1 1.832 322.3 25.7
1300 -569.7 -41.8 121.6 8.9 1292.1 1.157 815.4 2.057 362.0 26.6
1400 -707.6 -48.3 145.2 9.9 1217.2 1.090 723.6 2.296 404.1 27.6
1500 -869.0 -55.3 171.4 10.9 1152.4 1.032 648.6 2.550 448.8 28.6

284 Winchester/180 Berger 2950 fps

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 -1.5 *** 0.0 *** 2954.8 2.647 3488.9 0.000 0.0 ***
100 1.4 1.4 0.4 0.4 2814.0 2.520 3164.3 0.104 18.3 17.5
200 -0.0 -0.0 1.8 0.9 2677.6 2.398 2865.0 0.213 37.5 17.9
300 -6.3 -2.0 4.2 1.3 2545.3 2.280 2588.9 0.328 57.8 18.4
400 -18.0 -4.3 7.6 1.8 2416.9 2.165 2334.3 0.449 79.1 18.9
500 -35.6 -6.8 12.1 2.3 2292.2 2.053 2099.6 0.577 101.5 19.4
600 -59.8 -9.5 17.9 2.9 2171.0 1.945 1883.5 0.711 125.2 19.9
700 -91.5 -12.5 25.1 3.4 2053.6 1.839 1685.2 0.853 150.2 20.5
800 -131.3 -15.7 33.7 4.0 1939.9 1.738 1503.9 1.004 176.6 21.1
900 -180.5 -19.1 43.8 4.7 1830.3 1.639 1338.7 1.163 204.7 21.7
1000 -240.0 -22.9 55.7 5.3 1725.0 1.545 1189.1 1.332 234.4 22.4
1100 -311.2 -27.0 69.4 6.0 1624.5 1.455 1054.6 1.511 265.9 23.1
1200 -395.6 -31.5 85.0 6.8 1529.2 1.370 934.5 1.701 299.4 23.8
1300 -494.9 -36.4 102.7 7.5 1439.7 1.289 828.3 1.904 335.0 24.6
1400 -610.9 -41.7 122.7 8.4 1356.6 1.215 735.5 2.118 372.9 25.4
1500 -746.0 -47.5 144.9 9.2 1280.7 1.147 655.5 2.346 413.0 26.3

284 Winchester/ 168 Berger 3000 fps

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 -1.5 *** 0.0 *** 2955.0 2.647 3256.9 0.000 0.0 ***
100 1.5 1.4 0.5 0.4 2806.5 2.514 2937.8 0.104 18.3 17.5
200 -0.0 -0.0 1.9 0.9 2662.9 2.385 2644.8 0.214 37.6 18.0
300 -6.4 -2.0 4.4 1.4 2523.9 2.261 2375.8 0.330 58.0 18.5
400 -18.2 -4.3 8.0 1.9 2389.1 2.140 2128.8 0.452 79.5 19.0
500 -36.1 -6.9 12.9 2.5 2258.4 2.023 1902.2 0.581 102.3 19.5
600 -60.9 -9.7 19.1 3.0 2131.7 1.909 1694.8 0.718 126.3 20.1
700 -93.3 -12.7 26.8 3.7 2009.1 1.800 1505.5 0.863 151.8 20.7
800 -134.3 -16.0 36.0 4.3 1890.9 1.694 1333.5 1.017 178.9 21.4
900 -185.0 -19.6 46.9 5.0 1777.3 1.592 1178.1 1.180 207.7 22.0
1000 -246.8 -23.6 59.7 5.7 1668.7 1.495 1038.6 1.355 238.4 22.8
1100 -321.1 -27.9 74.5 6.5 1565.7 1.402 914.4 1.540 271.1 23.5
1200 -409.6 -32.6 91.5 7.3 1469.0 1.316 804.8 1.738 305.9 24.3
1300 -514.2 -37.8 110.7 8.1 1379.1 1.235 709.4 1.949 343.0 25.2
1400 -637.1 -43.5 132.4 9.0 1297.0 1.162 627.4 2.174 382.5 26.1
1500 -780.7 -49.7 156.5 10.0 1223.5 1.096 558.4 2.412 424.5 27.0


284 Winchester 162 Hornady Amax /3050 fps

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 -1.5 *** 0.0 *** 3055.3 2.737 3357.4 0.000 0.0 ***
100 1.3 1.3 0.5 0.4 2897.9 2.596 3020.3 0.101 17.7 16.9
200 -0.0 -0.0 1.9 0.9 2746.0 2.460 2712.0 0.207 36.5 17.4
300 -5.9 -1.9 4.4 1.4 2599.2 2.328 2429.8 0.319 56.2 17.9
400 -17.0 -4.1 8.0 1.9 2457.2 2.201 2171.5 0.438 77.1 18.4
500 -33.9 -6.5 12.8 2.5 2319.6 2.078 1935.1 0.564 99.2 19.0
600 -57.2 -9.1 19.0 3.0 2186.3 1.958 1719.2 0.697 122.7 19.5
700 -87.8 -12.0 26.6 3.6 2057.5 1.843 1522.4 0.839 147.6 20.1
800 -126.6 -15.1 35.8 4.3 1933.1 1.731 1344.0 0.989 174.1 20.8
900 -174.7 -18.5 46.7 5.0 1813.7 1.624 1183.0 1.149 202.3 21.5
1000 -233.4 -22.3 59.5 5.7 1699.5 1.522 1038.7 1.320 232.3 22.2
1100 -304.2 -26.4 74.4 6.5 1591.1 1.425 910.5 1.503 264.5 23.0
1200 -388.7 -30.9 91.4 7.3 1489.2 1.334 797.6 1.698 298.8 23.8
1300 -489.0 -35.9 110.8 8.1 1394.5 1.249 699.4 1.906 335.4 24.6
1400 -607.1 -41.4 132.6 9.0 1308.0 1.172 615.4 2.128 374.6 25.5
1500 -745.6 -47.5 157.0 10.0 1230.7 1.102 544.8 2.365 416.2 26.5

and Recoil...

assuming an 18 lb rifle

300 WM/220 @ 2850= 15.79

284 Win/180 @ 2959- 9.93

 

[GasLight]

Re: New 300 WM load for military VS 284 Winchester

I have not played with the 300WM much to know if those numbers are realistic or not, but to get that kind of velocity with the 180s in the .284, you are going to need a 30" barrel and will need to load them hot... Then you will also need a long action or single feed, cause you will need to load those out pretty far to get the case capacity you need, which will translate to a chamber reamed for the big bullets seated out.

Hopefully that doesn't detract from the .284, cause it is a cool round, but it definately has its limitations... The .300 will provide you factory and match grade ammo much easier than the .284, and the recoil advantage is easily compensated by a good brake.

What are you wanting to do with the rifle? 18 pounds is a lot of gun...

Dave

 

[ChadTRG42]

Re: New 300 WM load for military VS 284 Winchester

You're a little fast on the 284 data with those bullets. I'd run about max fps of about 2950 in the 168, and about 2750 on the 180. But you have the right idea. The 7mm bullets have a high BC, which equals flatter trajectory and less wind drift. The 220 grain bullet in the 300WM is ok, but the 208 A-max or 210 Berger will perform better (faster bullet with better BC). All options your looking at are a great option. I still shoot the 190 SMK in my 300WM since it shoots very accurate. Sometimes you're splitting hairs.

220 SMK is .629 BC
208 A-max is .648
210 Berger is .631

 

[chrisj]

Re: New 300 WM load for military VS 284 Winchester

The numbers on the 284 I listed do seem high, but I spoke to a number of long range shooters who are easily hitting the number that I mentioned. BBLS were 28+ ". Also...loaded rounds won't fit in a short action mag, but I'm not opposed to a long action.
As far as what I am going to do with the rifle...just paper and steel. I used 18 lbs because that is the approximate weight of the new MK 13 Mod 5 sniper rifle that shoots the 300 WM/220 load.
Factory ammo being availabel for the 300 WM is a valid point. I personally would never buy factory ammo since it is much cheaper for me to reload, but for some...being able to buy loaded ammo would be a big plus.