38/357 in uberti lighting rifle

[Sourdough]

I am considering getting this rifle and wonder if anyone has reloaded for it. I like a pump because I shoot left hand usually. I can also shoot right handed but I am left handed and left eyed and have used a pump off and on for the last 50 years or so. I have also used and owned lots of bolts and a few levers but always came back to the pump. I have several hundred 38 bullets in 158 gr. lead and also 38/357 dies which is why I would rather go with this round instead of the 45L colt which is also available in the same rifle. The rifle will have a 20" bbl.. I know that I can use the same loads I use in my pistols, but since it has a tubular mag. I expect to use a heavy crimp which I usually don't with my pistol rounds. Also, I have read that this rifle (and maybe others?) don't seal the chamber very well with light loads in the 45L colt. I also have a good supply of Longshot, Powerpistol, #9, #2, and 3 N 37 on hand. I usually load for my 40sw, and 9mm pistols. I expect to use #2 most often but would like to use one of the slower burners also since I will be shooting out of a 20" bbl.. Thanks for any suggestions, Sourdough