Gentlemen, I have a mighty strange case here. I have an 1884 Springfield Trapdoor. It's getting some really strange groups but I'll explain my load details first.
I've tried two bullets so far. Both Lee moulds, 405 grain. I have tried hollow base and solid, hard lead and soft lead, 70 grains of Schutzen powder. I have tried with and without an over powder card.
Here's the weird bit. I keep getting the strangest groupings. Reliably, I get two bullet holes touching each other and that's it. I get numerous such groups fairly widely dispersed. If I could get rid of the dispersion this would be a tack driver of a rifle. However it only seems to like having two holes touch at a time.
I don't suppose anyone here has any wisdom to share on this topic? I'd love to make the rifle reach its full potential.