I haven't used Beartooths 405 gr but years ago I did play around with a 400 gr 45-70 bullet sized down to .452". 17.5 gr of H110 pushed it to 950 fps with a OAL of 1.735" - the absolute max my Blackhawk would allow. For the standard 6 shot Rugers I think the 400 gr bullets are just to heavy for good performance. I don't use heavier than about 350 gr now and far more often 270 or 300 gr.bellard said:I see that beartooth has a 405 grain bullet listed for the .45 colt. I would love to try this one out in my redhawk. Has anyone out there had any experience with this heavyweight? and if so what load data did you use?