found that 55 & 56 gr IMR 4064 & 125grBT in 30-06 shoot very accurately. Is this too much powder??? Not alot of room left in the case asfter filling. Double checked my weights with 2 scales. no signs of pressure.IMR manual says 56.5gr max with 125gr sierra. Don't know velocities yet. I find most accurate load first then chrono after
Is this too much
- Thread starter barthowes
- Start date
Your charge appears to fall in safe territory according to your manual, and if you see no sign of pressure in your loads it probably is fine.
I wouldn`t simply switch to another bullet though without dropping back a couple grains and working back up. Just because you see no problems with the Ballistic Tip doesn`t mean the Sierra is a safe substitute.
I wouldn`t simply switch to another bullet though without dropping back a couple grains and working back up. Just because you see no problems with the Ballistic Tip doesn`t mean the Sierra is a safe substitute.
- Thread starter
- #3
- Nov 4, 2004
- 25,585
- 9,723
Sounds like a safe load. If you are satisfied with the velocity and accuracy, you are set to go.
JD338
JD338
- Oct 30, 2004
- 24,445
- 3,479
Cartridge : .30-06 Spring. (SAAMI)
Bullet : .308, 125, Nosler BalTip 30125
Cartridge O.A.L. L6: 3.340 inch or 84.84 mm
Barrel Length : 22.0 inch or 558.8 mm
Powder : IMR 4064
Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.754% 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
-17.5 82 46.18 2575 1841 31902 8055 89.0 1.256
-15.8 84 47.16 2628 1916 33664 8269 90.0 1.230
-14.0 86 48.14 2680 1994 35521 8478 91.0 1.204
-12.3 88 49.12 2733 2073 37478 8682 92.0 1.178
-10.5 89 50.11 2785 2153 39539 8879 92.9 1.148
-08.8 91 51.09 2838 2235 41711 9071 93.8 1.120
-07.0 93 52.07 2890 2318 44000 9256 94.6 1.092
-05.3 95 53.05 2942 2403 46413 9433 95.3 1.065
-03.5 96 54.04 2994 2489 48956 9602 96.1 1.039
-01.8 98 55.02 3046 2576 51639 9762 96.7 1.014
+00.0 100 56.00 3098 2665 54468 9914 97.3 0.990 ! Near Maximum !
+01.8 102 56.98 3150 2754 57454 10056 97.8 0.967 ! Near Maximum !
+03.5 103 57.96 3202 2845 60608 10189 98.3 0.944 ! Near Maximum !
+05.3 105 58.95 3253 2937 63939 10311 98.7 0.922 !DANGEROUS LOAD-DO NOT USE!
+07.0 107 59.93 3304 3030 67460 10422 99.1 0.900 !DANGEROUS LOAD-DO NOT USE!
+08.8 109 60.91 3355 3125 71185 10522 99.4 0.879 !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 100 56.00 3239 2912 64007 9856 99.9 0.922 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 100 56.00 2914 2357 45171 9533 91.1 1.078
Bullet : .308, 125, Nosler BalTip 30125
Cartridge O.A.L. L6: 3.340 inch or 84.84 mm
Barrel Length : 22.0 inch or 558.8 mm
Powder : IMR 4064
Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.754% 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
-17.5 82 46.18 2575 1841 31902 8055 89.0 1.256
-15.8 84 47.16 2628 1916 33664 8269 90.0 1.230
-14.0 86 48.14 2680 1994 35521 8478 91.0 1.204
-12.3 88 49.12 2733 2073 37478 8682 92.0 1.178
-10.5 89 50.11 2785 2153 39539 8879 92.9 1.148
-08.8 91 51.09 2838 2235 41711 9071 93.8 1.120
-07.0 93 52.07 2890 2318 44000 9256 94.6 1.092
-05.3 95 53.05 2942 2403 46413 9433 95.3 1.065
-03.5 96 54.04 2994 2489 48956 9602 96.1 1.039
-01.8 98 55.02 3046 2576 51639 9762 96.7 1.014
+00.0 100 56.00 3098 2665 54468 9914 97.3 0.990 ! Near Maximum !
+01.8 102 56.98 3150 2754 57454 10056 97.8 0.967 ! Near Maximum !
+03.5 103 57.96 3202 2845 60608 10189 98.3 0.944 ! Near Maximum !
+05.3 105 58.95 3253 2937 63939 10311 98.7 0.922 !DANGEROUS LOAD-DO NOT USE!
+07.0 107 59.93 3304 3030 67460 10422 99.1 0.900 !DANGEROUS LOAD-DO NOT USE!
+08.8 109 60.91 3355 3125 71185 10522 99.4 0.879 !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 100 56.00 3239 2912 64007 9856 99.9 0.922 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 100 56.00 2914 2357 45171 9533 91.1 1.078
- Thread starter
- #6
- Oct 30, 2004
- 24,445
- 3,479
Please do remember that this is only a prediction not a panacea. Treat data as if it came from a manual.
