450 Marlin
Powder Weight /Velocity Data for the 500gr RNFP

This data was generated in response to the question: is it possible to generate hunting loads in the 450 Marlin using 500gr bullets given the limited powder capacity left when one seats said bullets to Marlin OALs - if 500gr at 1500fps+ is a hunting load, then the answer is: yes. Of note: these loads in a light Marlin Guide Gun generated significant recoil... but also left the impression that anything hit at the target end was going to go down quickly.

Ballistically, the two interesting features are: being able to see the effects of insufficient load density in the RL7 data and the resulting ragged ignition (and once above that critical density seeing the statistics cleanup); and seeing that the time-pressure curve shape for the I3031 loads is such that the stucture of the bullet is destroyed at a much lower velocity (resulting in the gentleman's 12" groupsizes), than with the other powders.

Firearm :
Barrel :
Twist:
Optics:
Distance :
Shots :
Bullet Mfg :
Bullet Diam :
Marlin 1895m
18.5"
1:20"
24X
50y
10
Oregon Trail
.459"

 PW vs Vel graph for 450 Marlin with 
500gr RNFP
Graph produced by "RCBS.Load"

 
GMDR assumes NO liability for mishaps of any kind resulting from the use or misuse of this data
 
450 Marlin                             500gr RNFP
PR: WLR     CM: Horn     TempF: 62     OAL: 2.520"
        PT          PW   Vel   SD   GS 
AA2015 32.0 1211 25.2 2.3
  34.0 1275 7.1 3
  36.0 1344 10.3 2.5
  38.0 1417 8.8 5
  40.0 1501 11.9 12
 
450 Marlin                             500gr RNFP
PR: WLR     CM: Horn     TempF: 58     OAL: 2.520"
        PT          PW   Vel   SD   GS 
BlueDot 10.0 695 12.0 2.4
  11.0 790 16.2 1.17
  12.0 855 22.7 4.4
  13.0 927 20.7 2.0
  14.0 976 14.0 1.59
 
GMDR assumes NO liability for mishaps of any kind resulting from the use or misuse of this data

450 Marlin                             500gr RNFP
PR: WLR     CM: Horn     TempF: 66     OAL: 2.520"
        PT          PW   Vel   SD   GS 
BnchMrk 32.0 1119 15.58 1.68
  34.0 1201 10.4 1.28
  36.0 1282 22.6 2.1
  38.0 1354 11.0 3.5
  40.0 1433 10.3 12
 
450 Marlin                             500gr RNFP
PR: WLR     CM: Horn     TempF: 52     OAL: 2.520"
        PT          PW   Vel   SD   GS 
H2400 18.0 998 14.1 1.35
  19.0 1077 32.9 1.40
  20.0 1123 35.3 1.58
  21.0 1178 32.3 1.70
  22.0 1226 35.6 1.94
 
GMDR assumes NO liability for mishaps of any kind resulting from the use or misuse of this data
 
450 Marlin                             500gr RNFP
PR: WLR     CM: Horn     TempF: 64     OAL: 2.520"
        PT          PW   Vel   SD   GS 
H335 34.0 1135 25.7 2.1
  36.0 1221 7.5 1.10
  38.0 1297 16.2 2.0
  40.0 1362 11.6 2.0
  42.0 1428 9.6 2.7
 
450 Marlin                             500gr RNFP
PR: WLR     CM: Horn     TempF: 70     OAL: 2.520"
        PT          PW   Vel   SD   GS 
H4895 32.0 1040 19.8 2.2
  34.0 1113 18.5 3.3
  36.0 1184 11.3 1.96
  38.0 1266 13.0 3
  40.0 1337 11.1 3.6
 
GMDR assumes NO liability for mishaps of any kind resulting from the use or misuse of this data
 
450 Marlin                             500gr RNFP
PR: WLR     CM: Horn     TempF: 62     OAL: 2.520"
        PT          PW   Vel   SD   GS 
I3031 32.0 1059 30.3 2.1
  34.0 1142 13.0 1.15
  36.0 1237 14.3 1.82
  38.0 1304 14.3 7
  40.0 1390 13.8 12
 
450 Marlin                             500gr RNFP
PR: WLR     CM: Horn     TempF: 64     OAL: 2.520"
        PT          PW   Vel   SD   GS 
RL10 30.0 1202 27.9 3.1
  32.0 1263 11.8 2.9
  34.0 1332 9.6 3.7
  36.0 1407 8.7 2.5
  38.0 1481 7.2 4
 
GMDR assumes NO liability for mishaps of any kind resulting from the use or misuse of this data
 
450 Marlin                             500gr RNFP
PR: WLR     CM: Horn     TempF: 64     OAL: 2.520"
        PT          PW   Vel   SD   GS 
RL7 28.0 1037 38.5 1.23
  30.0 1176 26.1 1.32
  32.0 1309 22.2 3.2
  34.0 1393 17.9 2.2
  36.0 1468 19.6 1.95
 
450 Marlin                             500gr RNFP
PR: WLR     CM: Horn     TempF: 66     OAL: 2.520"
        PT          PW   Vel   SD   GS 
Varget 32.0 923 15.9 2.5
  34.0 998 14.2 1.05
  36.0 1096 8.7 2.2
  38.0 1186 15.4 1.58
  40.0 1244 12.0 2.3
 
GMDR assumes NO liability for mishaps of any kind resulting from the use or misuse of this data
 
450 Marlin                             500gr RNFP
PR: WLR     CM: Horn     TempF: 58     OAL: 2.520"
        PT          PW   Vel   SD   GS 
VVn130 26.0 991 50.3 2.9
  28.0 1064 589 1.62
  30.0 1166 15.5 1.75
  32.0 1251 19.8 3
  34.0 1341 18.0 2.6
 
450 Marlin                             500gr RNFP
PR: R9.5     CM: Horn     TempF: 52     OAL: 2.20"
        PT          PW   Vel   SD   GS 
VVn33 28.0 945 44.5 2.5
  30.0 1035 33.4 1.07
  32.0 1126 20.8 1.03
  34.0 1211 23.2 1.92
  36.0 1296 14.2 2.2
 
GMDR assumes NO liability for mishaps of any kind resulting from the use or misuse of this data
 
450 Marlin                             500gr RNFP
PR: WLR     CM: Horn     TempF: 70     OAL: 2.520"
        PT          PW   Vel   SD   GS 
VVn135 30.0 975 28.1 1.51
  32.0 1052 21.5 1.90
  34.0 1134 15.7 1.70
  36.0 1224 8.9 2.8
  38.0 1317 18.9 3.6
 
GMDR assumes NO liability for mishaps of any kind resulting from the use or misuse of this data
 

 

Group Size vs Velocity Graph for the 500gr RNFP

 Group Size graph for 450 Marlin with 500gr RNFP
Graph produced by "RCBS.Load"