I'm looking at a reproduction of an 1860 .54 Gallagher. This repro has a barrel twist of 1:18. The originals were 1:72 (in .52 caliber). I read that with a fast twist you should use harder lead or the grooves will fill up from soft lead and you'll have a smoothbore.
The repro Gallagher uses a cartridge with either a .540 bullet or a .535 roundball. The bullets or balls are hand/finger pressed in - no seating dies involved.
So, this is what I'm trying to wrap my brain around.
I'm thinking that with a slow twist (1:72) the ball or bullet doesn't have as much of a chance of engaging the rifling as in a fast twist (1:18). Or is that backwards thinking - the slower twist rifling actually has a better chance of grabbing the bullet/ball.
And, wouldn't softer lead engage the rifling better?
Any ideas or info?
The repro Gallagher uses a cartridge with either a .540 bullet or a .535 roundball. The bullets or balls are hand/finger pressed in - no seating dies involved.
So, this is what I'm trying to wrap my brain around.
I'm thinking that with a slow twist (1:72) the ball or bullet doesn't have as much of a chance of engaging the rifling as in a fast twist (1:18). Or is that backwards thinking - the slower twist rifling actually has a better chance of grabbing the bullet/ball.
And, wouldn't softer lead engage the rifling better?
Any ideas or info?