I have used both cast and jacketed bullets on a variety of animals including hogs and deer, both will work fine. While I know a lot of people like to use heavy for weight cast bullets, I like them as well, just to keep things in perspective I have killed 5 water buffalo and 1 very large hog using a 44 mag with Hornady 300 gr XTP magnum bullets. My point being if you have the XTPs in 300 gr on hand there is really no need to get anything different unless of course you just want to, then, by all means, go for it. I do it all the time.