dbblung
Sometimes the newest badest fastest is not the bestest thing out there... but then again most would say that I oldest unprogressive shooter out there, still living the 50's or 60's....
If you got the money to spend on them and at the range you are talking about really do not think you can beat a Nosler Partition or even some variety of Barnes. And if you have not got the money for those bullets - then a "poorman's" Nosler might be a Speer Gold Dot, since they are a bonded bullet they really hold together.
None of these are the pointy type high BC that seem to be popular these days, they are just "blue" collar working bullets.
If you are required to shoot conicals, Power Belts would be way down my list of viable projectiles. I would highly suggest one of Dan's Bull Shop lead conicals and we are certainly hearing a lot about the new Hornady FPB, unfortunately here in Idaho I could not use it during ML season because it has to be all lead.
In the beginning if you were using PB's because they were easy to load, well in today's world there are so many different sized 50 cal sabots out there you pretty much can find the one that fits your barrel, and loading can be a breeze also...
Powder! again I am still stuck in an rut - only because of price - but if you got it spend it - the new Blackhorn 209 powder is certainly an advancement and an option you can use in your Apex.
Have fun and good hunting...