I shoot at the lower end of your range due to fact I have "New" Vaquero in .45 Colt and am limited to 280 grain max bullets due to smaller cylinder length - .375" max length nose to crimp. I have settled on the 265 grain keith and the 255 WFN (I like plain base bullets) with 9 to10 grains of Unique. It is all about the meplat. I promote Beartooth bullets as the best but here are two options - The Penn Bullets Thunderhead and get this a 225 grain wadcutter with a full profile meplat - how great is that. The Thunderhead looks like a winner.
http://www.pennbullets.com/45/45-caliber.html
http://www.pennbullets.com/thunderheads.html
http://www.pennbullets.com/45/45-caliber.html
http://www.pennbullets.com/thunderheads.html