Oh goody!! Some swell Questions. Forums have been really quiet. But ....... I digress.
ALL the Uberti Toggle Link Reproduction rifles use the exact same magazine tube. For all the available cartridges. Well, sone of a gun,
so did Winchester. Although I don't actually remember if Winchester ever built the "Original" 73 in 38/357. I should know, but I don't
remember. Oh well. I digress again .............
There are those who champion a magazine tube liner in '66 and '73 Rifles. It seems to smooth out feeding. Or so it is said. I built and shot '66 and '73 Rifles for ages. I didn't find any real need for a mag tube liner. ALL of my .38 rifles fed just fine. They would actually run a whole bunch faster than I could run em. But ....... mechanically, I can see where maintaining cartridge alignment in the mag tube
might make feeding smoother, but it would probably only be noticeable to the top 10 shooters. EXCEPT ........
TA DA. I can fully agree with a tube liner in a 32-20. Abilene is spot on correctamundo. In that tunnel of a mag tube, 32-20s get all kinds of wonky. Wining em up would make a difference anyone could feel.
Over all the years I built/shot competition '66s and '73s, I found Truncated Cone bullets to be superior. My personal favorite was a 130Gr TC with a more rounded ogive. I can't remember where I got em. I'll have to go digging around.
Almost NO lever rifle will successfully digest Semi-Wadcutters. The shoulder at the front of the front driving band will hang up on the breach of the barrel and stop the rifle almost every time.
Coffinmaker
PS: The same bullet I really liked is available from "Ringers Bullets."