I've shot the same Marlin and I've just made a deal for a 92. Both are great rifles.
A couple of things I'm learning about OAL on this however (which I'm still in the middle of testing). When I set out on this journey, I knew I was loading for me and my 13 y/o daughter. Therefore, for her sake, I decided to stick to .38 special (as opposed to 45 LC or one of the other rounds). Next, I was trying to keep the recoil down (again, for her sake). So, I've been loading .38's with 125 gn bullets. Next, the OAL thing reared its ugly head -- club members told me to keep it to at least 1.50 OAL in order to feed in the 92 (which I was borrowing up to this point). I had no feed problems when sticking to this advice.
However, a 125 gn bullet, seated that shallow does allow quite a bit of fouling and unburned powder. I'm using Titegroup for my loads (of the powders I tried, this provided the best "complete combustion" of the candidates). So, I'm in the midst of trying out some 158 gn bullets over the next week or two (I actually loaded the first batch of 50 last night to test). If she can handle the recoil (which I'm thinking she'll be ok), then I may use these instead because I can set a 158 gn bullet more deeply and still get a 1.50 OAL. This should allow result in less fouling in the pistols (where I'm experiencing the most issues).
For clarification, the fouling is building up on the barrel-end of the cylinder which is causing issues when cocking because of the cylinder gap (especially on my new 1871 Open Tops).
I just thought I'd share a little of this information in case someone else is heading down this same road and experiences some of the same issues.
BTW, my 125 gn cowboy loads at 1.50 OAL shoot great in the 92 I'm purchasing. I've not seen any leading issues, but I'm fairly certain that has more to do with muzzle velocity/bullet selection/etc. than the OAL. Although, now that I think about it, a greater OAL will probably produce a lower muzzle velocity.....but I digress....
Happy Shooting!