Sixgunner,
Sure, don't get me wrong, shooting a .22 a lot will develop skills and is a cheap way of doing that. HOWEVER, many people do start shooting with the actual caliber they are going to use for SD and learn to use it just fine. Thus starting with a .22 and working up to larger calibers isn't necessary. I'm saying it does not have to be done using the caliber step up method.
Probably, starting with a .22 is a really good way to start kids off shooting, being smaller and having less grip strength, but adults can deal with .38s just fine.
The situation the OP stated here is a gun for SD and only one gun. Buying one gun to learn and practice with and a second gun for the actual intended purpose of SD (which of course, he would also have to practice with) does not sound like it's in the mix.
Sure, don't get me wrong, shooting a .22 a lot will develop skills and is a cheap way of doing that. HOWEVER, many people do start shooting with the actual caliber they are going to use for SD and learn to use it just fine. Thus starting with a .22 and working up to larger calibers isn't necessary. I'm saying it does not have to be done using the caliber step up method.
Probably, starting with a .22 is a really good way to start kids off shooting, being smaller and having less grip strength, but adults can deal with .38s just fine.
The situation the OP stated here is a gun for SD and only one gun. Buying one gun to learn and practice with and a second gun for the actual intended purpose of SD (which of course, he would also have to practice with) does not sound like it's in the mix.