243 85HPBT Quick Load

[George Foster]

Dr. Mike,

I wanted to see if you could run a Quick Load for me. Thank You in advance.

243 Win
22" Barrel
85HPBT Sierra
IMR 4064 Powder
Rem Case
Fed 210M Primer
2.650 OAL

 

[DrMike]

Cartridge          : .243 Win.
Bullet             : .243, 85, Sierra HPBT 1530
Useable Case Capaci: 50.394 grain H2O = 3.272 cm³
Cartridge O.A.L. L6: 2.650 inch = 67.31 mm
Barrel Length      : 22.0 inch = 558.8 mm
Powder             : IMR 4064

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% 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

-10.0   82    36.00   2839    1522   43995  10063     98.4    1.197
-09.0   83    36.40   2866    1551   45279  10154     98.6    1.181
-08.0   84    36.80   2894    1580   46597  10241     98.9    1.165
-07.0   85    37.20   2921    1610   47949  10325     99.1    1.150
-06.0   86    37.60   2947    1640   49337  10405     99.3    1.134
-05.0   87    38.00   2974    1669   50761  10482     99.4    1.120
-04.0   88    38.40   3001    1699   52222  10555     99.6    1.105  ! Near Maximum !
-03.0   88    38.80   3027    1729   53721  10624     99.7    1.091  ! Near Maximum !
-02.0   89    39.20   3053    1759   55260  10689     99.8    1.077  ! Near Maximum !
-01.0   90    39.60   3079    1790   56839  10750     99.9    1.063  ! Near Maximum !
+00.0   91    40.00   3105    1820   58459  10807     99.9    1.050  ! Near Maximum !
+01.0   92    40.40   3131    1850   60123  10860    100.0    1.037  !DANGEROUS LOAD-DO NOT USE!
+02.0   93    40.80   3157    1881   61831  10909    100.0    1.024  !DANGEROUS LOAD-DO NOT USE!
+03.0   94    41.20   3182    1911   63584  10955    100.0    1.011  !DANGEROUS LOAD-DO NOT USE!
+04.0   95    41.60   3207    1942   65383  11000    100.0    0.998  !DANGEROUS LOAD-DO NOT USE!
+05.0   96    42.00   3232    1972   67231  11045    100.0    0.986  !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     91    40.00   3208    1942   67546  10473    100.0    0.984  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba     91    40.00   2957    1650   49314  10845     97.2    1.137

 

[Seabee]

Superbly accurate bullet in every rifle I’ve used it in

 

[George Foster]

Thank You very much Dr. Mike.

 

[bdbrown66]

Here is a sample group with said bullet and powder from my Marlin XS7.



Brian

 

[bdbrown66]

Oops, that was 4166 and not 4064. But those powders are very similar, should get good results either way.

 

[ShadeTree]

I almost hate to publicly pile on because Sierra already has gotten proud of their bullets and jumped prices up to around $40 per 100 for standard C&C bullets before this got real bad and other standard C&C were still pretty much standard prices yet, and even after price jumps are still cheaper.

That said, yes, that's a great bullet in .243 caliber. In both accuracy and on game performance. Performs better than it should for it's weight class and being a C&C.