Been a few years since I've been on the site. My experience with cast boolits is .30 gas checked.
Recently I took up cowboy shooting and picked up a Pedersoli Down Under Sharps in .45-70 for a very good price. So far I've loaded some ammo with Lasercast 405gr boolits using Varget, H-4985, H-4198, IMR-4166 and IMR-3031 at one grain under max for Trapdoors using Hodgdon data. They all go bang reliably and all hit the target if I do my part at 200 yards. The problems are they lead the barrel more than I like and the recoil could be a bit less. We shoot mostly at 200 yards and sometimes at 300 yards so I do not need a really heavy boolit. My preferred primers are Fed 210M or 210.
I'd like to stay with the powders above since I can usually get them locally. Of them I prefer H-4895, H-4198 or IMR-4166 since they tend to not go out of stock locally. When I cast my own boolits I prefer LBT blue soft or 50/50 lube (LBT really preferred as the 50/50 gets really sticky and messy in the garage during Alabama summer).
What I need advice on is a good mold (single or double cavity doesn't matter) for 300-350 grain boolits and a good alloy that will be accurate to 300 yards and not lead the barrel. I do not want to fool with hollow point or hollow base.
Thanks.