Is this any good.Does it list many loads for double rifle cartridges especially with modern powders?

It is a very informative manual. Graeme Wright (Shooting The British Double Rifle) worked on the double rifle cartridge section. It lists loads for many European and British cartridges you won't find in other manuals. For example: 7x57R, 7x65R, 8x57IR, 8x57IRS, 9x57, .416 Taylor, .318 WR, .375-2.5", the .360s, the .400s, the .450s, the .470s, .500s including .500 BPE, .577s including .577 BPE, etc., etc., etc. And, of course, the US cartridges are equally covered.

I must mention that it does not have any information for cartridges smaller than .264/6.5mm. For those you will need one of the other loading sources. But the Woodleigh Bullets Loading Manual offers more for 6.5mm cartridges and larger (up to .700 NE!) than any other single source. For that reason, if not for any other, I highly recommend it.