accurate .380 300gr for 38-55

[Dom]

Just recently received an Accurate .380 300gr 2 cavity mold. Was ordered, so as to drop 300gr bullets fro scrape WW. The mold was cleaned . Powdered graphite was rubbed across the top of the mold , & the top & bottom side of the spure plate. Alignment pins also lubed. Used a Lee 10# bottom drop pot. Took a bit to get things warmed up. First 40% or so of the pot was a learning curve with the new mold. Finally got in tune with what the mold liked. Once the mold warmed up to me , good bullets started to drop. Next pot ought to be considerably more successful. After visually inspecting & measuring each bullet I ended up with 121 keepers. All retained bullets weighted between 305 & 306 grs. Bullets dropped from the mold at .381 to .382. PC'ed & sized to .380. I want to workup a load between 1400 & 1450 fps. for my Marlin Cowboy 38-55. With it's
1/18 twist it should easily stabilize this bullet, 1.07" in length. This weight of this bullet with the 1400 fps velocity should make it able to perform decent to 200yds. Max range I would ever expect 289630289631to use it. May be a day or two before I can start trials. PC'ed to J.D. Green

[bigdog454]

I have been trying to find some load data for a 270 gr. cast for the 38-55. I have found plenty for the 255 gr, and the 300 gr. I am considering using the start data of the 300 gr and working up from there for my new to me Win. 94 (mid 1950's era), don't know what the max would be, don't want to go there, but would like to find a good stiff load for deer hunting.
BD

[DonHowe]

See Lyman Cast Bullet Handbook 4th edition for data. If they don't show a 270gr bullet just split the difference between 255gr and 300gr.
For what it's worth mu Stevens single shot .38-55 has shot accurately to 400 yds with a 300gr bullet and 42gr of 2f black powder. Velocitu ain't be 1200fps. A friend loads 13gr (!)of 2400 under a 330gr bullet. His load is subsonic but shoots accurately to 400 yds from an Ubef t i High Wall
You don't have to are em go fast for accuracy tho for hunting you probably want to.