Just finished shooting a few loads I worked up...looks like IMR 4064 pushing 168 gr A MAX..Win brass and CCI BR2 primers...loaded to 2.80"...Was wondering if anyone has velocity out of a Rem 700 SPS-V 26" bbl? Also what's the best way to measure sight height? thanks -Brown
Range Report Velocity help please !!
- Thread starter MrBrown
- Start date
Re: Velocity help please !!
center-line of bore to center-line of scope is measured from ring/split to blow-hole
center-line of bore to center-line of scope is measured from ring/split to blow-hole
Re: Velocity help please !!
thanks bolt...looks like 2.0"...now if i can just get a velocity reading i'm set. -Brown
thanks bolt...looks like 2.0"...now if i can just get a velocity reading i'm set. -Brown
Re: Velocity help please !!
That's the problem...no chronograph
That's the problem...no chronograph
Re: Velocity help please !!
41.3gr looks like it lands on an accuracy node for the 26" barrel. I would start with that. An Amax at 2600fps is a good place to be, but I have not tested that load. I was running the 168 Amax with 45.5gr of RE15. That is a good load with 168gr SMK's as well.
Cartridge : .308 Win.
Bullet : .308, 168, Hornady A-MAX 30502
Cartridge O.A.L. L6: 2.800 inch or 71.12 mm
Barrel Length : 26.0 inch or 660.4 mm
Powder : IMR 4064
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 83 34.40 2210 1822 30276 5207 91.4 1.624
-18.0 86 35.26 2261 1907 32233 5356 92.5 1.581
-16.0 88 36.12 2312 1994 34293 5501 93.4 1.540
-14.0 90 36.98 2363 2082 36477 5641 94.3 1.500
-12.0 92 37.84 2413 2172 38800 5775 95.2 1.459
-10.0 94 38.70 2464 2264 41271 5903 96.0 1.418
-08.0 96 39.56 2514 2358 43901 6024 96.7 1.380
-06.0 98 40.42 2564 2453 46701 6139 97.3 1.343
-04.0 100 41.28 2614 2549 49683 6246 97.9 1.307
-02.0 102 42.14 2664 2647 52862 6345 98.4 1.272 ! Near Maximum !
+00.0 104 43.00 2713 2746 56253 6436 98.8 1.239 ! Near Maximum !
+02.0 106 43.86 2763 2847 59874 6519 99.2 1.207 !DANGEROUS LOAD-DO NOT USE!
+04.0 108 44.72 2812 2949 63742 6593 99.5 1.176 !DANGEROUS LOAD-DO NOT USE!
+06.0 111 45.58 2860 3052 67880 6657 99.7 1.146 !DANGEROUS LOAD-DO NOT USE!
+08.0 113 46.44 2909 3156 72312 6712 99.9 1.117 !DANGEROUS LOAD-DO NOT USE!
+10.0 115 47.30 2957 3261 77063 6757 100.0 1.089 !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 104 43.00 2819 2964 66419 6231 100.0 1.161 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 104 43.00 2567 2458 46414 6348 93.9 1.342
Get a Chronograph!
41.3gr looks like it lands on an accuracy node for the 26" barrel. I would start with that. An Amax at 2600fps is a good place to be, but I have not tested that load. I was running the 168 Amax with 45.5gr of RE15. That is a good load with 168gr SMK's as well.
Cartridge : .308 Win.
Bullet : .308, 168, Hornady A-MAX 30502
Cartridge O.A.L. L6: 2.800 inch or 71.12 mm
Barrel Length : 26.0 inch or 660.4 mm
Powder : IMR 4064
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 83 34.40 2210 1822 30276 5207 91.4 1.624
-18.0 86 35.26 2261 1907 32233 5356 92.5 1.581
-16.0 88 36.12 2312 1994 34293 5501 93.4 1.540
-14.0 90 36.98 2363 2082 36477 5641 94.3 1.500
-12.0 92 37.84 2413 2172 38800 5775 95.2 1.459
-10.0 94 38.70 2464 2264 41271 5903 96.0 1.418
-08.0 96 39.56 2514 2358 43901 6024 96.7 1.380
-06.0 98 40.42 2564 2453 46701 6139 97.3 1.343
-04.0 100 41.28 2614 2549 49683 6246 97.9 1.307
-02.0 102 42.14 2664 2647 52862 6345 98.4 1.272 ! Near Maximum !
+00.0 104 43.00 2713 2746 56253 6436 98.8 1.239 ! Near Maximum !
+02.0 106 43.86 2763 2847 59874 6519 99.2 1.207 !DANGEROUS LOAD-DO NOT USE!
+04.0 108 44.72 2812 2949 63742 6593 99.5 1.176 !DANGEROUS LOAD-DO NOT USE!
+06.0 111 45.58 2860 3052 67880 6657 99.7 1.146 !DANGEROUS LOAD-DO NOT USE!
+08.0 113 46.44 2909 3156 72312 6712 99.9 1.117 !DANGEROUS LOAD-DO NOT USE!
+10.0 115 47.30 2957 3261 77063 6757 100.0 1.089 !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 104 43.00 2819 2964 66419 6231 100.0 1.161 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 104 43.00 2567 2458 46414 6348 93.9 1.342
Get a Chronograph!
Re: Velocity help please !!
Well looks like i need a chronograph...thanks for the help guys. -Brown
Well looks like i need a chronograph...thanks for the help guys. -Brown
