Lodobe, don't dought you for a second. But with adjustable, I shoot the same sight picture, everytime(after sight in, of course). Things always look the same in the sight picture and are the same. But, to each his own. I just prefer to have my pistols shooting the same everytime I shoot and every calibers sights to look the same, hence I prefer the adjustable. My memory isn't as good as some other shooters. I own pistols in .22(6 total), .357(two total), .45(2), .44(2). Not a large collection by somes standard, but if I had to remember where each one shot, I'd be lost.