I have a 1894 and both saeco moulds.
409 is a 4 cavity 195gn tc and the 410 is a 2 cavity 220 gn rnfp.
The 409 works flawlessly thru the action and is pretty accurate.
The 410 seems to shoot better at longer range but is snicky through the action if crimped in the groove.
It improves if I crimp further forward.
I am only using this for paper punching @ 1200fps.
How about a tumble lube version of the 409 in 6 or 8 cavity?
Maybe similar for the 410 with a shorter nose?