With Marlin barrel lengths from 18 to 26 inches, using the same bullet, is there any advantage to faster powders in shorter barrels? Slower in longer barrels?
Thanks.
No. Use the same powders you would use with a longer barrel. The real issue that is a benefit with the .47/70 is that it will consume a huge range of powders.
.45-70 Government 22 inch Barrel Marlin 1895 SS
Bullet Load Powder O. A. L. Velocity Energy Comments
300gn Hornady HP
48gn IMR 4198 1977
50gn IMR 4198 2049 Good Load
53gn Rel 7 1944
54gn Rel 7 1967
44gn 2400 2078 Good Load
350gn Speer FP
59gn IMR 3031 1880
60gn IMR 3031 1927
59gn AR 2206 1827
60gn AR 2206 1864
50gn Rel 7 1871 .620 MOA Most Accurate load
400gn Speer FP
56gn IMR 3031 1837 Best allround load
57gn IMR 3031 1880 3140 Compressed Load
46gn IMR 4198 1870
47gn IMR 4198 1914 3256 MAX - Case head expansion
55gn IMR 4320 1694 Mild
56gn IMR 4064 1754 Mild
36gn 2400 1730
37gn 2400 1769 Mild recoil - accurate
39gn IMR 4227 1704
40gn IMR 4227 1752
405gn Remington
46gn IMR 4198 1793
46gn Rel 7 1709
47gn Rel 7 1729
55gn Rel 12 1617
56gn Rel 12 1693
57gn IMR 3031 1903 3258 Top Velocity
500gn Hornady
50gn IMR 4064 1491 SINGLE LOADED ONLY
46gn AR 2206 1416
48gn AR 2206 1434
44gn AR 2207 1550 2668 Good Load
45gn AR 2207 1576
45gn Rel 7 1531
46gn Rel 7 1564
48gn Rel 12 1366
50gn Rel 12 1439
Note the differnece in velocity with the longer 26 Inch Barrel.
.45-70 Government 26 inch barrel 1895 Cowboy
Bullet Load Powder O. A. L. Velocity Energy Comments
250gn Barnes X
54gn VARGET 1928
60gn H 4198 2650 3900 Compressed Load
46.5gn H 4227 2507 Barnes #4 MAX
47gn 2400 2554
48gn 2400 2616 3800
300gn JHP W-W Factory 1833 Mild
300gn Remington
54gn VARGET 1745 Mild
55gn H 4198 2322 3593
57gn H 4198 2396 3825
58gn H 4198 2454 4013 B. Pierce top load for 38,000 PSI
59gn H 4198 2476 4085
35gn 2400 1791 Practice load
44gn 2400 2354 3692
45gn 2400 2381
300gn Barnes X
52gn H 4198 2287 3484
55gn H 4198 2322
41.5gn H 4227 2220 Barnes #4 MAX
44gn 2400 2318
45gn 2400 2333
300gn Barnes TSX
42gn H 4227
55gn AA2230
56gn H 4198
58gn H 4198
405gn Remington R-P Factory 1228 Very Mild
405gn Remington
50gn H 4198 2058 3810 Good Load
54gn VARGET 1772 2825
37gn 2400 1922
405gn Woodleigh
50gn H 4198 2026 3692 Great Heavy Game Load
37gn 2400 1861 Mild recoil heavy timber load
405gn Plain Cast
40gn H 4198
42gn H 4198
46gn H 4198 1902
36gn H 4227
40gn H 4227 1903
50gn VARGET
54gn VARGET 1755
46gn H 322
50gn H 322 1922