Reggie,
As it turns out, I'm off to the range tomorrow to try some cast bullets in the 416 Taylor in the below post topic.
I have the RCBS mould, a 290 grain one from NEI, a 410 grain NEI, a 450 grain CBE and a 370 grain LBT, all gas-checked.
I'll be sure to post some results if the weather holds off tomorrow (raining in my part of Queensland at the moment.)

Regards,
David.