Ok have another thought rossi makes these rifles in a variety or calibers such as 44mag and 454 casal the 44mag producing 36,000 psi and the casull at 65,000. The 45 colt is only 14,000 if the rifles are all made from the same process [or are they ?] than will the 45 colt in that make and model hold a higher presure to produce a flatter round. Dont worry i dont try this things until I have educated myself some may call it thinking outside the box. I call it just a thought what if or why?