In addition to Paul's loads,
here is some info

375 LBT LFN-GS 23.0 H110 1239fps
425 LBT LFN-GS 18.0 H110 1070fps
390 LBT LFN-PB 21.0 H110 1128fps
390 LBT LFN-PB 20.0 H110 1090fps

These were cast performance bullets

325 gold Dot 27.0 H110 1280fps
325 XTP 25.6 H110 1200fps
325 XTP factory 1310fps
375 LBT GC 23.0 H110 1240fps more recoil than 20.0 gra H110 390 LBT
375 Lbt 24.0 H110 1287fps

370lbt PB 24.0 H110
325 XTP 23.0-27.0 H110
425 LBT 18-18.0 H110
370 LBT PB 9.0 Win 231
390 PB 16.0 2400 Not a good load for me stopped that powder
400 Lee (from BBT bullets) 7.0 - 8.0 Titegroup powder
390 LBT 7.0-8.0 Titegroup

Titgroup is a great fun powder I loaded a box yesterday
375 10.0 Titegroup

400 Lee 19.0-21.0 Lil Gun
390 LBT 21.0 Lil Gun

This is Hornady load data

400 XTP 9 1/24 SRH 1.630 length


1000 1100 1150 1200 1250fps
Vith V110 15.3 16.7 17.3
2400 14.8 16.6 17.5
AA#9 15.2 17.0 18.0
Lil gun 15.30 16.8 17.7 18.6 19.6
H110 17.4 19.2 20.1 21.0
Win 296 17.9 19.7 20.6 21.5

325 XTP 1100 1200 1300 1400 1450fps 1500
Vh N110 17.00 18.6 20.3 21.9
2400 16.6 18.5 20.5 22.5
AA#9 16.4 18.6 20.8 23.0
Lil Gun 16.1 18.6 21.2 23.7 24.9
H 110 19.8 21.7 23.6 25.5 26.4 27.3
Win 296 20.1 22.3 24.4 26.6 27.7
IMR 4227 22.1 23.5 25.4


Kelly Brost from Cast performance gave me this data

390 grain H4227 17.0-19.0 grains 1012fps
370 grain H4227 17.0-20.00 805- 1032fps

findarticles.com http://www.findarticles.com/cf_0/m0BTT/154_25/77824414/p1/article.jhtml?term=480+ruger this is the john taffin article with lots of data

Hope this is helpful

you can email or personal message me if you need any other info or need any advice. I have been using this a lot. The hornady dies is what I have been using on my Dillon 550

Hope I didn't give you information overload