I don't think I said that I adhere to those standards - I just said that the ammo I loaded does. And all factory loaded ammo does that I have ever come in contact with. The ammo meets SAAMI standards, and the cylinder on my 25-2 and 25-3 do as well. You seem to want to crimp the 454424 in the lube grooves which is NOT what SAAMI says to do, but it will work in a Ruger revolver with an over S&W level of propellant. It's not something that Lyman or SAAMI recommends. The Keith bullet has lube grooves and driving lands.

You deciding to crimp into a lube groove is what you can do by ignoring the OAL specs in Lyman's latest reloading manual and in the SAAMI specs.

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S&WHF #946
S&WCA #3824