NOPE!

Slow down you old sourdough!

Your 454 will extend your range! A 300gr xtp at 1700fps will give you another 50 yards at the very least! And probably closer to 100yds! Every model 83 454 I have had, and that is four, have shot this bullet very well! I have not seen a Freedom Arms that would not shoot more accurately than most shooters. But I have seen you shoot. I believe you and your 454 will easily do 150yds accurately and probably further. I don't believe the 45 colt is up to that task. You have plenty time to ring out the 454. As an old sheep hunter you know more than anybody you sometimes just can't get closer. Don't handy cap yourself to 100yds or less! Time to make a bond with the Freedom Arms you stole!

Just my most humble opinion of course!

Regards
Mark