With a .452 bore, if you can find 453 or 454 diameter bullets, try them.
If all you can find is 452, there's still some tricks.
You do have a chronograph, right ?
Are you casting these bullets?
If it's a relatively soft alloy, say 11-12 BHN, I would use the non-GC bullet and start with the Titegroup powder. I wouldn't go over 6 grains or so. Maybe 1200 fps. Probably a tumble lube will work at that velocity, 2 coats.
With the Lilgun, I would use the checked bullet, but that's just me.
Use a good soft lube, 50/50 beeswax/Alox is a good one. Any of Lars' soft lubes from LS Stuff are good.
If all you can find is 452, there's still some tricks.
You do have a chronograph, right ?
Are you casting these bullets?
If it's a relatively soft alloy, say 11-12 BHN, I would use the non-GC bullet and start with the Titegroup powder. I wouldn't go over 6 grains or so. Maybe 1200 fps. Probably a tumble lube will work at that velocity, 2 coats.
With the Lilgun, I would use the checked bullet, but that's just me.
Use a good soft lube, 50/50 beeswax/Alox is a good one. Any of Lars' soft lubes from LS Stuff are good.