I cant imagine these would "rattle down" a bore. The upper band/s were typically over sized on Great Plains to achieve a better fit. Pretty common conical too around the time RW wrote that article. How could he miss it is anyone's guess since he is "an expert" on the subject.


In my SUPER DISC i shoot a .458 Gould HP that has been sized down to .452. Accuracy is exceptional and its only .002 over lands in that rifle. Its pretty simple to seal a conical if that is a concern. Veggie, wool wads or if you really want tight they sell poly wads for a couple cents each. I have no doubt a .463 poly wad will seal extremely well in my bores. The ones for 50cal are .512. The largest OD 50cal sabot is maybe around .509-.510 and the base with the skirt is typically quite a bit less.
https://www.buffaloarms.com/reloadin...wads/poly-wads

IMO about the only real con for casting FOR sabots is getting the hardness and sabot fit right....Too soft in a tight sabot and you might deform the ogive when loading them....Too hard and the bullet will act like a hardcast on impact. Virtually no expansion. Thats not a huge problem really if you choose a mold with a large metplat.