Need info for .338 lapua mag load

[powdergun]

I've poured over every manual I have and can't find a load for the following combination.

Rifle: Sako
Calibre: 338 lapua mag
Bullet: Hornady 225 gr. SST
Brass: Norma
Powder: I'd like to use IMR 4831. If a load doesn't exist what would be a good substitute ?

If someone has a min and max for this load it would be greatly appreciated.

Thanks

 

[acrashb]

QuickLOAD says 87.8 grains is the max. While I've found this to be a great program, use your own judgement - this does not constitute me recommending the load.

 

[powdergun]

start load

Would it be safe to consider that 10% below the 87.8 gr would be a good starting point ?

 

[ricciardelli]

IMR-4831 From 74.8 grains to 90.5 grains
Federal 215 Primer

I preferred:
Magnum From 98.0 grains to 103.0 grains
Federal 215 Primer

 

[acrashb]

Notice on the lower-right of the pic it says "Results without any guarantee on usability". If I were you, I would find published loads for powders with similar burn rate and see if it looks reasonable, then carefully experiment. I am not going to recommend any specific load, since I don't have enough liability insurance to cover a mishap.

Having said that, the loading books I read say to start 10% below 'max'. And, on .50AE, .223, and 308, QuickLOAD has predicted bullet speed to within a few percent, which suggests that, for at least those cartridges, it's accurate about pressures.

 

[coyote tech 421]

My Hornady manual has IMR 4831 loads from 74.8 to 86.1 gr max, COL of 3.565 andFed. 215 primers.

Pat

 

[762nato]

Min 74.8 max 86.1 Hornady Sixth Edition COAL 3.565" Primer listed is FED 215.

Andy

 

[catnthehatt]

Here's another chart from quikload but with the powder I like, H4831SC
Cartridge : .338 Lapua Mag.
Bullet : .338, 225, HDY SST InterLock 33202
Cartridge O.A.L. L6: 3.681 inch or 93.50 mm
Barrel Length : 24.0 inch or 609.6 mm
Powder : Hodgdon H4831 SC

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-20.0 82 76.00 2403 2885 33229 10281 90.0 1.547
-18.0 84 77.90 2466 3038 35584 10623 91.4 1.504
-16.0 86 79.80 2529 3196 38112 10952 92.7 1.459
-14.0 88 81.70 2593 3359 40828 11267 93.9 1.411
-12.0 90 83.60 2657 3526 43747 11567 95.0 1.366
-10.0 92 85.50 2721 3698 46892 11848 96.0 1.321
-08.0 94 87.40 2785 3874 50278 12110 96.9 1.279
-06.0 96 89.30 2849 4054 53934 12350 97.7 1.238
-04.0 98 91.20 2913 4239 57879 12568 98.4 1.198
-02.0 100 93.10 2977 4427 62147 12761 99.0 1.160 ! Near Maximum !
+00.0 102 95.00 3041 4619 66771 12927 99.4 1.123 ! Near Maximum !
+02.0 104 96.90 3104 4815 71788 13067 99.7 1.088 !DANGEROUS LOAD-DO NOT USE!
+04.0 106 98.80 3168 5014 77239 13177 99.9 1.053 !DANGEROUS LOAD-DO NOT USE!
+06.0 108 100.70 3231 5216 83179 13256 100.0 1.020 !DANGEROUS LOAD-DO NOT USE!
+08.0 110 102.60 3294 5420 89661 13315 100.0 0.988 !DANGEROUS LOAD-DO NOT USE!
+10.0 112 104.50 3356 5628 96752 13369 100.0 0.957 !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba 102 95.00 3174 5032 80571 12482 100.0 1.041 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 102 95.00 2852 4065 54409 12709 94.4 1.230

 

[catnthehatt]

And here is your trajectory chart!
(I love this program! )
Cat
Gun / Ammunition : .338 Lapua Mag.
Bullet : .338, 225, HDY SST InterLock 33202
Bullet weight : 225 grains or 14.58 Grams
Muzzle velocity : 3041 fps
Crosswind speed : 1 Mph
Ballistic Coefficient(s) (G1):
C1=0.430@V>0 fps;


Optimum trajectory information :
Optimum sight-in range (X) = 207 Yds.
with max. ordinate above LOS at range (M)= 127 Yds.
and max. point blank range (P)= 239 Yds.
-------------------------------------------------------------------------------------
Sight-in clicks, 1 click = 1.0 cm/100 m or 0.394 in/100 m
Height of sight above bore axis = 5.0 cm or 1.969 inch
Gun is zeroed-in at 300 yds,
by sighting-in at level firing
-------------------------------------------------------------------------------------
Range Velo Time of Energy Path Deflection Total Sight correction Target
city flight to at crosswind drop for setting new lead
LOS of 1.0 Mph zero range 33 fps
-------------------------------------------------------------------------------------
·Yards fps s ft.lbs. in. in. MOA in. Clicks MOA yds ·
-------------------------------------------------------------------------------------
| 0 3041 0.0000 4620 -2.0 0.0 ----- 0.0 ------ ----- 0.00
| 10 3018 0.0099 4551 -1.3 0.0 0.00 0.0 +35.1 +12.05 0.11
| 20 2996 0.0198 4483 -0.6 0.0 0.01 0.1 +8.3 +2.84 0.22
| 30 2973 0.0298 4416 0.0 0.0 0.01 0.2 -0.3 -0.11 0.33
| 40 2951 0.0399 4349 +0.6 0.0 0.02 0.3 -4.4 -1.50 0.44
| 50 2928 0.0501 4284 +1.2 0.0 0.03 0.5 -6.5 -2.25 0.55
| 60 2906 0.0604 4219 +1.7 0.0 0.03 0.7 -7.8 -2.69 0.66
| 70 2884 0.0707 4155 +2.2 0.0 0.04 0.9 -8.6 -2.94 0.77
| 80 2862 0.0812 4092 +2.6 0.0 0.05 1.2 -9.0 -3.09 0.89
| 90 2840 0.0917 4030 +3.0 0.1 0.06 1.6 -9.2 -3.15 1.00
| 100 2819 0.1024 3969 +3.3 0.1 0.06 2.0 -9.2 -3.16 1.12
| 110 2797 0.1131 3908 +3.6 0.1 0.07 2.4 -9.1 -3.13 1.24
| 120 2775 0.1239 3848 +3.9 0.1 0.08 2.9 -8.9 -3.07 1.36
| 130 2754 0.1348 3789 +4.1 0.1 0.09 3.4 -8.7 -2.98 1.47
| 140 2733 0.1458 3731 +4.2 0.1 0.09 4.0 -8.4 -2.88 1.59
| 150 2712 0.1569 3673 +4.3 0.2 0.10 4.6 -8.0 -2.76 1.72
| 160 2690 0.1681 3616 +4.4 0.2 0.11 5.2 -7.6 -2.62 1.84
M 169 2671 0.1782 3565 +4.4 0.2 0.12 5.9 -7.2 -2.49 1.95
| 170 2669 0.1793 3560 +4.4 0.2 0.12 5.9 -7.2 -2.48 1.96
| 180 2648 0.1906 3504 +4.4 0.2 0.12 6.7 -6.8 -2.32 2.08
| 190 2628 0.2021 3449 +4.3 0.3 0.13 7.5 -6.3 -2.16 2.21
| 200 2607 0.2135 3395 +4.2 0.3 0.14 8.4 -5.8 -1.99 2.34
| 210 2586 0.2251 3342 +4.0 0.3 0.14 9.3 -5.3 -1.81 2.46
| 220 2566 0.2367 3289 +3.8 0.4 0.15 10.2 -4.7 -1.63 2.59
| 230 2545 0.2484 3237 +3.5 0.4 0.16 11.2 -4.2 -1.44 2.72
| 240 2525 0.2602 3185 +3.2 0.4 0.17 12.3 -3.6 -1.25 2.85
| 250 2505 0.2721 3134 +2.8 0.5 0.17 13.4 -3.1 -1.05 2.98
| 260 2485 0.2839 3084 +2.3 0.5 0.18 14.6 -2.5 -0.85 3.11
| 270 2465 0.2959 3034 +1.9 0.5 0.19 15.8 -1.9 -0.65 3.24
| 280 2445 0.3080 2985 +1.3 0.6 0.19 17.1 -1.3 -0.44 3.37
| 290 2425 0.3203 2937 +0.7 0.6 0.20 18.4 -0.6 -0.22 3.50
X 300 2405 0.3326 2889 0.0 0.7 0.21 19.8 0.0 0.00 3.64
| 310 2385 0.3451 2842 -0.7 0.7 0.22 21.2 +0.7 +0.23 3.77
P 319 2367 0.3565 2800 -1.4 0.7 0.22 22.6 +1.3 +0.43 3.90
| 320 2366 0.3578 2795 -1.5 0.7 0.22 22.8 +1.3 +0.46 3.91
| 330 2346 0.3705 2749 -2.4 0.8 0.23 24.3 +2.0 +0.69 4.05
| 340 2327 0.3834 2704 -3.3 0.9 0.24 26.0 +2.7 +0.93 4.19
| 350 2307 0.3964 2659 -4.3 0.9 0.25 27.7 +3.4 +1.18 4.34
| 360 2288 0.4095 2615 -5.3 1.0 0.26 29.5 +4.1 +1.43 4.48
| 370 2269 0.4227 2572 -6.5 1.0 0.26 31.4 +4.9 +1.68 4.62
| 380 2250 0.4361 2529 -7.7 1.1 0.27 33.3 +5.6 +1.94 4.77
| 390 2231 0.4495 2486 -8.9 1.2 0.28 35.3 +6.4 +2.20 4.92
| 400 2212 0.4631 2444 -10.3 1.2 0.29 37.3 +7.2 +2.46 5.06
| 410 2193 0.4768 2403 -11.7 1.3 0.30 39.5 +7.9 +2.73 5.21
| 420 2175 0.4906 2362 -13.2 1.4 0.31 41.7 +8.7 +3.00 5.37
| 430 2156 0.5045 2322 -14.7 1.4 0.32 43.9 +9.5 +3.27 5.52
| 440 2137 0.5185 2282 -16.3 1.5 0.33 46.3 +10.3 +3.55 5.67
| 450 2119 0.5326 2243 -18.0 1.6 0.33 48.7 +11.1 +3.83 5.82
| 460 2101 0.5468 2204 -19.8 1.7 0.34 51.2 +12.0 +4.12 5.98
| 470 2082 0.5611 2166 -21.6 1.7 0.35 53.8 +12.8 +4.40 6.14
| 480 2064 0.5755 2128 -23.6 1.8 0.36 56.4 +13.7 +4.69 6.29
| 490 2046 0.5901 2091 -25.5 1.9 0.37 59.1 +14.5 +4.99 6.45
| 500 2028 0.6047 2054 -27.6 2.0 0.38 61.9 +15.4 +5.28 6.61
-------------------------------------------------------------------------------------
M = Peak vs. L.O.S, X = Set Zero, P = Max. Point Blank Range
Elevation above Angle of Site (0.0 deg.) = 0.1154 deg.