Load data for .308 Norma Mag. + .308 | 170gr | Geco PLUS

.308 Norma Mag. cartridge drawing
Geco logo

Load Specifications

Bullet Manufacturer:Geco
Bullet Weight:170 gr
Bullet Diameter:0.308"
Bullet Length:<<locked>>
Case Length (l3):2.559"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:86.5 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:24"
Max. allowed Pressure:63,817 psi
Recommended Twist Rate:1:15.5

Load data in caliber .308 Norma Mag. with .308 | 170gr | Geco PLUS bullet and 98 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-16 and Alliant Reloder-26.

Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.

Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.

Charge: Powder weight in grains. Start with the minimum load and work up carefully.

FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.

MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.

V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.

z (Powder Burn): Estimated propellant combustion percentage at bullet exit.

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Max Load - Barrel Length: 24"

PowderChargeFRMaxP%V(0)z
Accurate 2495<<locked>>84%57,290 psi90%2835 fps100%
Accurate 2700<<locked>>84%54,969 psi86%2848 fps98.3%
Accurate 3100ᴾ<<locked>>100%52,098 psi82%2884 fps99.2%
Accurate 4064<<locked>>86%57,464 psi90%2887 fps100%
Accurate 4350<<locked>>92%54,549 psi85%2943 fps100%
ADI AR 2206H<<locked>>82%56,347 psi88%2913 fps100%
ADI AR 2208<<locked>>88%57,508 psi90%2920 fps100%
ADI AR 2209<<locked>>98%55,550 psi87%2979 fps97.7%
ADI AR 2213ᴾ<<locked>>100%53,098 psi83%2966 fps95.9%
Alliant Power Pro 2000-MR<<locked>>84%56,956 psi89%3045 fps100%
Alliant Reloder- TS 15.5<<locked>>86%54,795 psi86%2890 fps100%
Alliant Reloder-15<<locked>>84%55,100 psi86%2913 fps100%
Alliant Reloder-16<<locked>>94%55,100 psi86%2995 fps100%
Alliant Reloder-17<<locked>>90%56,478 psi89%3022 fps100%
Alliant Reloder-19<<locked>>98%54,853 psi86%2966 fps97.7%
Alliant Reloder-22ᴾ<<locked>>100%51,793 psi81%2963 fps97.3%
Alliant Reloder-23ᴾ<<locked>>100%48,863 psi77%2900 fps100%
Alliant Reloder-25ᴾ<<locked>>100%42,670 psi67%2815 fps98.3%
Alliant Reloder-26ᴾ<<locked>>100%56,478 psi89%3104 fps100%
Baschieri & Pellagri 107<<locked>>82%56,420 psi88%2933 fps100%
Bofors RP15ᴾ<<locked>>100%47,500 psi74%2881 fps96.1%
Bofors RP3<<locked>>86%55,796 psi87%2910 fps100%
Bofors RP5ᴾ<<locked>>100%51,793 psi81%2963 fps97.3%
Bofors RP7<<locked>>90%55,143 psi86%2890 fps98.5%
Hodgdon H380<<locked>>86%56,057 psi88%2923 fps99.9%
Hodgdon H414<<locked>>92%56,666 psi89%2992 fps99.2%
Hodgdon H4350<<locked>>90%56,565 psi89%2949 fps98.2%
Hodgdon H4831ᴾ<<locked>>100%57,014 psi89%2972 fps96.1%
Hodgdon H4831 SCᴾ<<locked>>100%55,724 psi87%2953 fps95.8%
Hodgdon H4895<<locked>>82%57,014 psi89%2923 fps100%
Hodgdon Hybrid 100V<<locked>>96%55,477 psi87%2920 fps100%
Hodgdon LEVERevolution<<locked>>84%57,261 psi90%2959 fps100%
Hodgdon Superformance<<locked>>92%57,101 psi89%3031 fps99%
Hodgdon TrailBossᴾ<<locked>>100%36,201 psi57%1808 fps100%
Hodgdon VARGET<<locked>>82%54,491 psi85%2874 fps100%
IMR 4064<<locked>>86%57,029 psi89%2904 fps100%
IMR 4166 Enduron<<locked>>84%56,304 psi88%2887 fps99%
IMR 4350<<locked>>94%56,057 psi88%2923 fps98.7%
IMR 4451 Enduron<<locked>>90%56,768 psi89%2920 fps99%
IMR 4831<<locked>>94%54,926 psi86%2930 fps100%
IMR 4895<<locked>>84%56,536 psi89%2943 fps100%
IMR 4955 Enduron<<locked>>98%55,085 psi86%2907 fps95.9%
Lovex D073.6<<locked>>82%57,014 psi89%2890 fps100%
Lovex S060<<locked>>82%55,288 psi87%2838 fps100%
Lovex S062<<locked>>86%57,116 psi90%2897 fps100%
Lovex S065<<locked>>92%56,768 psi89%2913 fps99.7%
Lovex S070<<locked>>92%54,505 psi85%2900 fps99%
Lovex S071ᴾ<<locked>>100%43,453 psi68%2733 fps97.7%
Norma 201<<locked>>82%55,114 psi86%2858 fps100%
Norma 202<<locked>>82%55,724 psi87%2854 fps100%
Norma 203B<<locked>>84%54,389 psi85%2900 fps100%
Norma 204<<locked>>94%56,855 psi89%2976 fps97.8%
Norma MRPᴾ<<locked>>100%55,042 psi86%3048 fps99%
Norma URP<<locked>>94%56,855 psi89%2979 fps100%
Ramshot Big Game<<locked>>84%55,042 psi86%2927 fps100%
Ramshot Hunter<<locked>>94%55,608 psi87%2979 fps99.5%
Ramshot Magnumᴾ<<locked>>100%45,266 psi71%2818 fps96.3%
ReloadSwiss RS 14ᴾ<<locked>>100%36,883 psi58%1850 fps100%
ReloadSwiss RS 50<<locked>>86%56,086 psi88%2910 fps99.4%
ReloadSwiss RS 52<<locked>>82%56,086 psi88%2982 fps100%
ReloadSwiss RS 60<<locked>>88%56,101 psi88%3018 fps100%
ReloadSwiss RS 62<<locked>>92%54,244 psi85%2959 fps99.9%
ReloadSwiss RS 70<<locked>>94%56,594 psi89%3045 fps100%
Rottweil R 902<<locked>>84%55,854 psi88%2861 fps100%
Rottweil R 903<<locked>>88%55,680 psi87%2904 fps100%
Rottweil R 904<<locked>>98%57,377 psi90%2953 fps97%
Rottweil R 905ᴾ<<locked>>100%57,667 psi90%3009 fps98.3%
Rottweil R 907<<locked>>90%55,143 psi86%2890 fps98.5%
Shooters World Long Rifle<<locked>>92%56,768 psi89%2913 fps99.7%
Shooters World Match Rifle<<locked>>82%57,014 psi89%2890 fps100%
Shooters World Precision<<locked>>86%57,116 psi90%2897 fps100%
Shooters World SW4350<<locked>>92%54,505 psi85%2900 fps99%
SNPE Vectan SP 11<<locked>>88%57,276 psi90%2963 fps100%
SNPE Vectan SP 9<<locked>>82%54,897 psi86%2887 fps100%
SNPE Vectan Tubal 3000<<locked>>82%56,130 psi88%2792 fps100%
SNPE Vectan Tubal 5000<<locked>>88%56,840 psi89%2789 fps100%
SNPE Vectan Tubal 7000<<locked>>92%56,608 psi89%2867 fps99.1%
SNPE Vectan Tubal 8000ᴾ<<locked>>100%57,159 psi90%3005 fps98.2%
Somchem S335<<locked>>82%55,637 psi87%2785 fps100%
Somchem S341<<locked>>82%57,392 psi90%2907 fps100%
Somchem S355<<locked>>88%55,651 psi87%2900 fps100%
Somchem S365<<locked>>96%55,869 psi88%2979 fps100%
Somchem S385<<locked>>98%54,766 psi86%2930 fps98.5%
Vihtavuori N133<<locked>>82%56,579 psi89%2772 fps100%
Vihtavuori N135<<locked>>84%55,985 psi88%2818 fps100%
Vihtavuori N140<<locked>>84%56,362 psi88%2831 fps100%
Vihtavuori N150<<locked>>90%57,130 psi90%2877 fps100%
Vihtavuori N160<<locked>>92%55,477 psi87%2923 fps100%
Vihtavuori N165ᴾ<<locked>>100%50,285 psi79%2844 fps97.4%
Vihtavuori N540<<locked>>84%54,491 psi85%2828 fps100%
Vihtavuori N550<<locked>>92%54,404 psi85%2923 fps99.9%
Vihtavuori N555ᴾ<<locked>>100%54,810 psi86%2982 fps100%
Vihtavuori N560ᴾ<<locked>>100%55,434 psi87%3038 fps96.2%
Winchester 6.5 StaBALL<<locked>>92%55,056 psi86%2887 fps100%
Winchester 760<<locked>>92%56,913 psi89%2995 fps99.2%
Winchester StaBALL HDᴾ<<locked>>100%44,121 psi69%2953 fps100%
Winchester StaBALL Match<<locked>>82%54,984 psi86%2894 fps100%
Winchester Supreme 780ᴾ<<locked>>100%54,810 psi86%2920 fps97.6%

Recommended = one of the top powders for this cartridge and bullet combination.

Start Load - Barrel Length: 24"

PowderChargeFRMaxP%V(0)z
Accurate 2495<<locked>>80%50,285 psi79%2736 fps100%
Accurate 2700<<locked>>80%48,095 psi75%2733 fps97%
Accurate 3100<<locked>>88%34,592 psi54%2543 fps95%
Accurate 4064<<locked>>80%47,616 psi75%2743 fps100%
Accurate 4350<<locked>>80%36,143 psi57%2595 fps97.3%
ADI AR 2206H<<locked>>80%53,055 psi83%2864 fps100%
ADI AR 2208<<locked>>80%44,962 psi70%2710 fps99.5%
ADI AR 2209<<locked>>92%45,672 psi72%2802 fps95.4%
ADI AR 2213<<locked>>98%49,850 psi78%2904 fps95%
Alliant Power Pro 2000-MR<<locked>>80%49,516 psi78%2923 fps99.9%
Alliant Reloder- TS 15.5<<locked>>80%45,397 psi71%2736 fps100%
Alliant Reloder-15<<locked>>80%48,602 psi76%2808 fps99.8%
Alliant Reloder-1657.2 gr80%35,273 psi55%2602 fps97.4%
Alliant Reloder-17<<locked>>80%39,842 psi62%2730 fps99.6%
Alliant Reloder-19<<locked>>92%45,223 psi71%2795 fps95.5%
Alliant Reloder-22<<locked>>96%45,469 psi71%2844 fps95.7%
Alliant Reloder-23<<locked>>82%27,528 psi43%2405 fps95.5%
Alliant Reloder-25<<locked>>94%35,404 psi55%2638 fps95.8%
Alliant Reloder-2667.9 gr86%33,823 psi53%2641 fps96.1%
Baschieri & Pellagri 107<<locked>>80%52,721 psi83%2877 fps99.9%
Bofors RP15<<locked>>98%44,614 psi70%2825 fps95.3%
Bofors RP3<<locked>>80%45,658 psi72%2746 fps100%
Bofors RP5<<locked>>96%45,469 psi71%2844 fps95.7%
Bofors RP7<<locked>>80%40,364 psi63%2612 fps95.2%
Hodgdon H380<<locked>>80%46,006 psi72%2753 fps99%
Hodgdon H414<<locked>>80%38,058 psi60%2638 fps95.1%
Hodgdon H4350<<locked>>82%43,801 psi69%2723 fps95.4%
Hodgdon H4831<<locked>>98%53,287 psi84%2910 fps95.3%
Hodgdon H4831 SC<<locked>>98%52,315 psi82%2897 fps95%
Hodgdon H4895<<locked>>80%53,679 psi84%2874 fps100%
Hodgdon Hybrid 100V<<locked>>80%32,764 psi51%2497 fps98%
Hodgdon LEVERevolution<<locked>>80%50,256 psi79%2854 fps100%
Hodgdon Superformance<<locked>>82%39,813 psi62%2707 fps95.1%
Hodgdon TrailBoss<<locked>>80%27,108 psi42%1617 fps100%
Hodgdon VARGET<<locked>>80%51,300 psi80%2822 fps100%
IMR 4064<<locked>>80%47,268 psi74%2746 fps99.8%
IMR 4166 Enduron<<locked>>80%49,559 psi78%2772 fps98%
IMR 4350<<locked>>84%41,002 psi64%2648 fps95.4%
IMR 4451 Enduron<<locked>>80%41,800 psi66%2648 fps96.1%
IMR 4831<<locked>>80%34,766 psi54%2546 fps97%
IMR 4895<<locked>>80%49,864 psi78%2838 fps100%
IMR 4955 Enduron<<locked>>96%51,663 psi81%2848 fps95.1%
Lovex D073.6<<locked>>80%53,127 psi83%2835 fps100%
Lovex S060<<locked>>80%52,112 psi82%2789 fps100%
Lovex S062<<locked>>80%47,645 psi75%2746 fps100%
Lovex S065<<locked>>80%39,276 psi62%2595 fps96.9%
Lovex S070<<locked>>80%37,449 psi59%2572 fps95.1%
Lovex S071<<locked>>94%35,752 psi56%2569 fps95.4%
Norma 201<<locked>>80%51,880 psi81%2808 fps100%
Norma 202<<locked>>80%52,446 psi82%2805 fps100%
Norma 203B<<locked>>80%47,979 psi75%2792 fps99.9%
Norma 204<<locked>>88%46,311 psi73%2792 fps95.5%
Norma MRP<<locked>>90%39,073 psi61%2736 fps95.2%
Norma URP<<locked>>80%35,940 psi56%2589 fps97.1%
Ramshot Big Game<<locked>>80%48,124 psi75%2815 fps99.9%
Ramshot Hunter<<locked>>82%37,289 psi58%2628 fps95.8%
Ramshot Magnum<<locked>>98%42,177 psi66%2756 fps95.3%
ReloadSwiss RS 14<<locked>>80%27,615 psi43%1657 fps100%
ReloadSwiss RS 50<<locked>>80%46,108 psi72%2736 fps97.9%
ReloadSwiss RS 52<<locked>>80%52,431 psi82%2927 fps100%
ReloadSwiss RS 60<<locked>>80%42,351 psi66%2789 fps100%
ReloadSwiss RS 62<<locked>>80%35,810 psi56%2608 fps96.9%
ReloadSwiss RS 7062.6 gr80%34,954 psi55%2612 fps96%
Rottweil R 902<<locked>>80%49,284 psi77%2756 fps100%
Rottweil R 903<<locked>>80%42,917 psi67%2690 fps99.8%
Rottweil R 904<<locked>>94%50,502 psi79%2838 fps95.5%
Rottweil R 905<<locked>>92%44,280 psi69%2776 fps95.4%
Rottweil R 907<<locked>>80%40,364 psi63%2612 fps95.2%
Shooters World Long Rifle<<locked>>80%39,276 psi62%2595 fps96.9%
Shooters World Match Rifle<<locked>>80%53,127 psi83%2835 fps100%
Shooters World Precision<<locked>>80%47,645 psi75%2746 fps100%
Shooters World SW4350<<locked>>80%37,449 psi59%2572 fps95.1%
SNPE Vectan SP 11<<locked>>80%44,092 psi69%2746 fps99.7%
SNPE Vectan SP 9<<locked>>80%51,503 psi81%2831 fps100%
SNPE Vectan Tubal 3000<<locked>>80%52,707 psi83%2743 fps100%
SNPE Vectan Tubal 5000<<locked>>80%44,498 psi70%2608 fps100%
SNPE Vectan Tubal 7000<<locked>>80%38,464 psi60%2539 fps95.3%
SNPE Vectan Tubal 8000<<locked>>92%43,859 psi69%2772 fps95.3%
Somchem S335<<locked>>80%52,431 psi82%2740 fps100%
Somchem S341<<locked>>80%53,592 psi84%2851 fps100%
Somchem S355<<locked>>80%43,395 psi68%2690 fps99.8%
Somchem S365<<locked>>80%32,387 psi51%2543 fps99%
Somchem S385<<locked>>90%41,989 psi66%2700 fps95.7%
Vihtavuori N133<<locked>>80%53,243 psi83%2726 fps100%
Vihtavuori N135<<locked>>80%49,632 psi78%2726 fps100%
Vihtavuori N140<<locked>>80%49,690 psi78%2736 fps100%
Vihtavuori N150<<locked>>80%41,350 psi65%2621 fps100%
Vihtavuori N160<<locked>>80%37,405 psi59%2592 fps97.5%
Vihtavuori N165<<locked>>96%44,121 psi69%2730 fps95.8%
Vihtavuori N540<<locked>>80%47,993 psi75%2730 fps100%
Vihtavuori N550<<locked>>80%36,767 psi58%2589 fps97.1%
Vihtavuori N555<<locked>>82%30,153 psi47%2480 fps95.7%
Vihtavuori N560<<locked>>98%51,866 psi81%2976 fps95.3%
Winchester 6.5 StaBALL<<locked>>80%36,550 psi57%2559 fps99.2%
Winchester 760<<locked>>80%38,232 psi60%2641 fps95.1%
Winchester StaBALL HD<<locked>>84%25,962 psi41%2425 fps95%
Winchester StaBALL Match<<locked>>80%51,561 psi81%2841 fps100%
Winchester Supreme 780<<locked>>94%44,440 psi70%2743 fps95.1%

Recommended = one of the top powders for this cartridge and bullet combination.

ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.

<<locked>> you need an access license to unlock this data.

This overview compares 109 powders for .308 Norma Mag. loaded with the .308 | 170gr | Geco PLUS. Alliant Reloder-26 delivers the highest muzzle velocity at 3,104 fps; across all powders the maximum-charge window runs from 1,808 fps to 3,104 fps. Accurate 3100 gives the best case fill at 100 %, and 109 of the 109 powders fall inside the usable 80–100 % fill window.

Relative to the caliber's maximum pressure (440 MPa), the top charges use 53–90 %, leaving at least 10 % headroom. The 170.0 gr projectile in 0.308" calls for a 1:15.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2213 reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. ReloadSwiss RS 70, Alliant Reloder-16, Alliant Reloder-26 rank at the top here: for .308 Norma Mag. with the .308 | 170gr | Geco PLUS they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2225, Baschieri & Pellagri 109, Bofors RP30 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.

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