I load .3006,.223 Rem.,45/70,.270 Win,7.62 x 54R,and .35 Rem. w/my double disk on a Lyman T-Mag II with no problem.Sometimes have to cycle 2 or 3 times.But I check every 5th dump.One thing I did do is got some longer screws for the d-disk setup on the powder hopper so I could use the brass nut that came with kit.Much easier to use.....Rick