I have never carried a 910, but my (former) S&W 915 had many many hours in the holster. Since then I have carried various full size 3rd Gen 9mm Smiths. I was less than thrilled with the weight of the 5946 but found the alloy framed guns carry well. Carrying OWB they conceal well as they have a nice rounded overall profile and are very flat. The 910 is not as rounded, but it is equally flat. I am not a fan of IWB carry, which would make it disappear ever more.