I like RCBS stuff a lot. That said, I don't have a Rangemaster. I've loaded for years and years with just a 5-0-5 scale and an Uniflow powder measure. I've been happy with that but almost all my reloading has been for handguns.
This thread recently discussed powder measures and has pros and cons for the RCBS Rangemaster.
the RCBS Chargemaster uses what is basically a 750 Rangemaster as its scale. Put a Rangemaster next to a Chargemaster to see what I mean. Fifteen charges of each powder were thrown and checked on a camera and needle modified Lyman M5 mechanical. Unless intended for long range precision loads I think it works plenty good enough for most
Code:
RCBS Chargemaster 1500
IMR 4350 RL10X CFE223 Win 231
AVG 24.96 AVG 25.0 AVG 25.02 AVG 24.95
STD DEV 0.07 STD DEV 0.05 STD DEV .05 STD DEV .04
ES 0.2 ES 0.2 ES .2 ES .10
I like to develop my loads weighing to the kernel to find flat velocity nodes spanning two or three tenths so I can load to the tenth of a grain
I have the Lyeman Gen 6 and the Hornady. I like them both.
Both have annoyances, but all in all, I like them a lot.
Lyman: Not as accurate, good enouigh for +/- a tenth so nice for bulk loading when in center of a node.
Hornday: While it misses from time to time, its dead on accurate. Its slow getting there though. I like the beep to say I am done (or I blew it try again)
I use them both at the same time and double production speed.