If you plan on, or need to do a lot of shooting at 50+ yd.'s, you might need the hevi-shot loads. I can see where if you've got to hunt in open country, you might consider it. Where I hunt it's unusual to get a shot beyond 30 yd. That being said, I've killed a turkey stone dead at 52 yd.s with #4 lead (mis-judged the range in the rain).
Since then I bought one box of Win Xtended Range after trying them. I have the X-R shell as my second shot in the magazine. I haven't needed it yet.