Quickload Request - 450 Marlin

[NYDAN]

Since the factory 350 br. Hornady FP bullet loads are more accurate in my rifle than the 325 gr. Flex Tip factory loads, I have ordered some 350 gr. Hornady FP bullets to reload.

Would someone be so kind as to run a projection with the following criteria? Thank you.

Caliber - 450 Marlin
Barrel Length - 24"
Bullet - 350 gr. Hornady Flat Point (Hornady no. 4503)
Powder - H4198
O.A.L - 2.530"
Overflow case capacity - 76.4 gr.

 

[Wyo7200]

Cartridge : .450 Marlin
Bullet : .458, 350, Hornady FP 4503
Useable Case Capaci: 57.878 grain H2O = 3.758 cm³
Cartridge O.A.L. L6: 2.530 inch = 64.26 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Hodgdon H4198

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.5% 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

-15.0 81 40.38 1780 2464 27337 2891 87.3 1.641
-13.5 82 41.09 1808 2542 28493 2953 88.1 1.612
-12.0 83 41.80 1836 2621 29697 3014 88.8 1.584
-10.5 85 42.51 1864 2701 30951 3074 89.5 1.557
-09.0 86 43.23 1892 2783 32255 3133 90.1 1.530
-07.5 88 43.94 1920 2865 33606 3192 90.8 1.503
-06.0 89 44.65 1948 2949 35005 3249 91.4 1.478
-04.5 91 45.36 1976 3033 36455 3305 92.0 1.453
-03.0 92 46.08 2003 3119 37964 3360 92.6 1.428
-01.5 93 46.79 2031 3206 39537 3413 93.2 1.403
+00.0 95 47.50 2059 3294 41177 3466 93.7 1.379 ! Near Maximum !
+01.5 96 48.21 2086 3382 42887 3516 94.3 1.355 ! Near Maximum !
+03.0 98 48.93 2114 3472 44672 3566 94.8 1.332 ! Near Maximum !
+04.5 99 49.64 2141 3563 46533 3614 95.2 1.309 ! Near Maximum !
+06.0 100 50.35 2169 3655 48477 3660 95.7 1.287 !DANGEROUS LOAD-DO NOT USE!
+07.5 102 51.06 2196 3748 50506 3705 96.1 1.266 !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 95 47.50 2154 3604 47869 3507 98.2 1.296 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 95 47.50 1940 2926 34634 3296 86.6 1.483

 

[NYDAN]

Wyo7200, Thank you.