H&R handi in 500 S&W. What's the best boolit, powder, and BP lube?

[MBTcustom]

I have a client who wants me to deliver this rifle complete with molds and suggested load data. (dang I love this business!!!)
I need a 350ish grain boolit, and a 500-550ish grain boolit preferably Accurate Mold designs.
Any suggestions?
Also, t'would be a sin to consider handing over this rifle without some BP loads (its so close to the 50-110 its scary) so any suggestions on a good BP lube would be appreciated also.
I can figure out the other aspects fairly easily, but I thought you fellers might have some good insight to a boolit design that is a winner with this one.
Thanks!

[gutpile]

I used the lee 515-500-f sized it with a .512 sizer and then a .501 sizer lube was 3 lbs regular crisco to 1.5 lbs beeswax was using 5744 at 1400 FPS it FLATTENS deer recoil was a shove not a rap i casted out of stick on WW was also using the c501-440-RF and 10 grains of unique

[MBTcustom]

Sounds easy enough! What kind of group did you get out of that combo?

[gutpile]

1.5 in @ 50 with the 440 3 in @ 100 with the 500