Lee moulds do have their quirks
41 mag, I feel your pain. I was a diehard iron mould caster for over 45 years. But then I did have a couple of the early Lee single cavity moulds for conical BP loads. Used then lightly and thus never had a problem. Last year I got a 2 Cavity 45-70 mould by Lee and had all sorts of problems. Pins falling out, crappy alignment, the works. Got the mould thing fixed by Lee ( customer service is top notch) and by then I had learned the little things I needed to know about Lee moulds. (as opposed to all my old iron)
When you get the lead out (sounds like something my dad used to say) and start to cast again, give this additional actions a try:
1. Get a flat piece of iron or a real small anvil and keep it close. When you go to close your moulds, lay it flat atop the plate so the plate guides both blocks together for proper alignment. This really does help with alignment!
2. Once you get going, cast at a fast pace. These moulds cool off fast!
3.And Lube that sprue plate when it starts to bind up.
And by all means, read the other threads that the other fine folks here have stated. I may have years of iron casting under my belt, but the Lee moulds are a different animal. The folks here in this forum have years of time invested with these and many other systems. There will be more than one that will have the answer you seek no matter what.
Good luck with your casting
Wade[smilie=s: