There is 1 and ONLY 1 reason to buy a ruger 45acp over a Sig P220........ You don't have the money for the Sig. Ruger makes a fine gun. And the P345 is no exception. But it's NOT a Sig P220. The Ruger NEW is going to go for $400-$450. Used; easily around $300. The Sig P220 NEW is going to go for $850-$1100. And a USED one between $500-$650. Of course there's always a great deal out there some place. There's also ones with night sights, extra magazines, grips, and other accessories that can alter the price. But you are talking literally of double the price NEW OR USED of a P220 of a Ruger P345. Personally, there isn't one bad thing I could ever say about the Sig P220. And the ONLY thing better than a New P220 is an older model made in West Germany. But the ruger is a fine gun. Personally, I think Ruger makes one of the BEST revolvers in the world. Them and S&W are the leaders. But in the semi-auto world, Ruger isn't the same level of quality as their revolvers. Just my opinion. And personally; I love the DA/SA of the P220. All my defensive carry guns are DA/SA guns. You just can't beat the quality, reliability, and accuracy of the P220.