I had a 454 SRH that I just sold. I also have a Bisley 45 colt. I've shot both side by side - 45 colt with 300 gr hard cast over 25.0 gr H110 (1275) and 454 with 340 cast over 28 gr H110 (1375). The 454 was actually more pleasent to shoot - not that either was horrendous.

I really dig the 5.5" SS Bisley's. I sold the 454 because I didn't see the need for 2 - 45 cal 'magnums'.