Quickload Check Please - 308 win 165GR Sierra Gamechanger

A

A-bolt243

CGN Regular
Rating - 100%
4   0   0
Just wondering if someone can check this load in quickload.

45.5 gr Varget
165gr sierra tipped gameking
Lapua Brass
2.80" COAL

I am seeing some ejector marks in the brass, I will try reducing the load a bit but this is shooting 0.5" or better groups with 2800 fps average velocity and SD's in the 5 range.

Thanks
 
Looks like you are over pressure...

Cartridge : .308 Win. (SAAMI)
Bullet : .308, 165, Sierra TGK 4665
Useable Case Capaci: 47.053 grain H2O = 3.055 cm³
Cartridge O.A.L. L6: 2.800 inch = 71.12 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Hodgdon VARGET *T

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 87 36.39 2271 1890 33367 5955 91.5 1.466
-18.0 89 37.30 2325 1980 35607 6129 92.6 1.426
-16.0 91 38.21 2378 2072 37997 6297 93.6 1.386
-14.0 93 39.12 2431 2166 40551 6459 94.5 1.346
-12.0 95 40.03 2484 2261 43276 6614 95.3 1.307
-10.0 98 40.94 2538 2359 46196 6761 96.1 1.270
-08.0 100 41.85 2591 2459 49295 6901 96.8 1.234
-06.0 102 42.76 2643 2560 52596 7033 97.5 1.200
-04.0 104 43.67 2696 2663 56130 7155 98.1 1.166 ! Near Maximum !
-02.0 106 44.58 2749 2768 59917 7269 98.6 1.134 ! Near Maximum !
+00.0 108 45.49 2801 2875 63981 7372 99.0 1.103 !DANGEROUS LOAD-DO NOT USE!
+02.0 111 46.40 2854 2983 68347 7464 99.3 1.073 !DANGEROUS LOAD-DO NOT USE!
+04.0 113 47.31 2906 3093 73043 7546 99.6 1.044 !DANGEROUS LOAD-DO NOT USE!
+06.0 115 48.22 2958 3205 78102 7616 99.8 1.016 !DANGEROUS LOAD-DO NOT USE!
+08.0 117 49.13 3009 3318 83561 7673 99.9 0.989 !DANGEROUS LOAD-DO NOT USE!
+10.0 119 50.04 3061 3433 89463 7719 100.0 0.963 !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 108 45.49 2908 3098 75333 7149 100.0 1.035 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 108 45.49 2653 2579 52894 7268 94.3 1.193 ! Near Maximum !
 
44.8grs Varget 165gr Sierra SPBT is what I used for years when using 165s ... COAL: 2.800

I moved on awhile ago to 155gr Sceners for target shooting: 48.7grs CFE223, sometimes 46.6grs TAC (depending on what powder I have at the time).

Hunting: 175gr Terminal Ascent, 44.0grs RL 15.5 (max load C).

Work up - all under .5 in mine ... otherwise why reload?
 
Lightning Rod said:
sierra's page lists a max charge of 45gr
https://sierrabullets.com/content/load-data/rifle/308/308-winchester.pdf
just in case you are not aware that you can download data from their site
Click to expand...
Yes I used the Sierra data when I worked up my original loads and went to 45.5 instead of 45.4 like the sierra data states. I'll knock it back and work up slowly, likely staying under the 45gr mark. I do have a good load at 45 grains varget with the original 165 gameking bullet as well.

Thanks firebat for the confirmation.
 
You must log in or register to reply here.
Back
Top Bottom