Mir 4451 120 bt 6.5 creedmoor

[Michael C. Smith]

Loaded 43g in Peterson brass with a coal of 2.925 Fed 210 primers. It shot around 3/4 of a inch @ 100 and about 1.5 at 200. Don't have any data with this powder and bullet. I normally shoot 44 g of H4350 so I backed down a grain.

6.5 creedmoor
Peterson brass 50.2 h2o capacity
Imr 4451
22 in barrel
Fed 210
120 ballistic tip nosler coal 2.925

If someone could be so kind as run it through quick load please. Just would like a idea where I am at. Thank you Michael and happy New Year.

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[DrMike]

Using the parameters supplied:

Cartridge          : 6.5 Creedmoor Hornady
Bullet             : .264, 120, Nosler BalTip 26120
Useable Case Capaci: 47.390 grain H2O = 3.077 cm³
Cartridge O.A.L. L6: 2.925 inch = 74.30 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : IMR 4451 Enduron

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   89    38.61   2694    1934   45863   8745     95.2    1.270
-09.0   90    39.04   2722    1974   47273   8844     95.6    1.252
-08.0   91    39.47   2750    2014   48726   8940     96.0    1.235
-07.0   92    39.90   2777    2055   50223   9035     96.4    1.218
-06.0   93    40.33   2805    2096   51766   9126     96.7    1.201
-05.0   94    40.76   2833    2138   53355   9216     97.0    1.185
-04.0   95    41.18   2860    2180   54993   9303     97.4    1.169  ! Near Maximum !
-03.0   96    41.61   2888    2222   56682   9387     97.6    1.153  ! Near Maximum !
-02.0   97    42.04   2915    2265   58423   9469     97.9    1.137  ! Near Maximum !
-01.0   98    42.47   2943    2308   60218   9547     98.2    1.122  ! Near Maximum !
+00.0   99    42.90   2970    2351   62069   9623     98.4    1.107  ! Near Maximum !
+01.0  100    43.33   2998    2395   63979   9696     98.7    1.092  !DANGEROUS LOAD-DO NOT USE!
+02.0  101    43.76   3025    2438   65950   9766     98.9    1.078  !DANGEROUS LOAD-DO NOT USE!
+03.0  102    44.19   3052    2483   67983   9833     99.1    1.064  !DANGEROUS LOAD-DO NOT USE!
+04.0  103    44.62   3080    2527   70082   9896     99.2    1.050  !DANGEROUS LOAD-DO NOT USE!
+05.0  104    45.05   3107    2572   72249   9957     99.4    1.036  !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     99    42.90   3086    2538   72096   9454    100.0    1.038  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba     99    42.90   2814    2110   52214   9387     93.4    1.196

 

[Michael C. Smith]

Thank you Dr.Mike I see that I am right on the edge. I make back it down a couple tenths and see what accuracy does. I saw no pressure sings on my cases. It was about 40 degs when I shot them.

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[SJB358]

I’d be okay with that load. You aren’t really in the danger zone at all if it’s running well and your brass is coming out unscathed.

 

[RAD57]

What is IMR 4451 heat of explosion?