Lyman mould 358070 make a 150 grain round nose hollow base bullet well suited to the .38 Long Colt. I load them over 17 grains Goex FFFg black powder and a card wad. They shoot well in my Colt M1901 (.361 bore) and M1903 (.357 bore) Army revolvers. A friend tried them in his Model 1877 but they were not as accurate as his black power loads using the 150 grain round nose, heeled bullet he casts from a Lyman 358160.

Both of those moulds are long out of production, but a couple of commercial casters are making a suitable heeled bullet.

.38 Colt and .41 Colt have been loaded with both hollow base and heel bullets. Some guns seem to work OK with either one and some show a preference for one or the other. Having a buddy with "other" type mould a couple of Lightnings and an SAA in .41 Colt that is what we have observed .