Have a bunch of old but unopened Dupont 4759 powder, want to use it in my 38/55 Hi-Wall and my Marlin 1895 Leverers. Found loads for my 45/70 but not the 38/55's. Any recommendations? Bullet will probably be a 255 gr cast.
Have a bunch of old but unopened Dupont 4759 powder, want to use it in my 38/55 Hi-Wall and my Marlin 1895 Leverers. Found loads for my 45/70 but not the 38/55's. Any recommendations? Bullet will probably be a 255 gr cast.
Hey, Rice; I had good luck with Lyman's 375248 a decade or two ago using SR4759. The charge was 18.0 grains, using Winchester brass, and Federal 210M primers for an estimated 1350 fps from the 24" bbl. This was in a Winchester 1894, built in 1921. I had good grouping at 50 yds (3/4" for 3 shots from a cold bbl.) using a Lyman or Marbles tang sight.
I don't have any notes on the sizing, nor bullet alloy however. And as always, this load was OK, pressure-wise in my rifle, but you should work up slowly if interested. I encountered no signs of excessive pressure, and leading, if any, was minimal. The barrel had strong rifling, but did have some dark areas.
I no longer have the gun. Best Regards and I hope this helps. Best Regards, Rod
Rod
RCBS No 1 manual show 20 grs at 1533 and 22 grs at 1676 with their 37-250 FN mold out of 24 inch barrel in a Win 94.
Regards
John
Old Lyman manual shows:
375248 with 10.5 gr (estimated 1050 fps)
375296 with 21.0 gr (1589 fps)
BP | Bronze Point | IMR | Improved Military Rifle | PTD | Pointed |
BR | Bench Rest | M | Magnum | RN | Round Nose |
BT | Boat Tail | PL | Power-Lokt | SP | Soft Point |
C | Compressed Charge | PR | Primer | SPCL | Soft Point "Core-Lokt" |
HP | Hollow Point | PSPCL | Pointed Soft Point "Core Lokt" | C.O.L. | Cartridge Overall Length |
PSP | Pointed Soft Point | Spz | Spitzer Point | SBT | Spitzer Boat Tail |
LRN | Lead Round Nose | LWC | Lead Wad Cutter | LSWC | Lead Semi Wad Cutter |
GC | Gas Check |