Okay I got a lot of nice suggestions for what to do with my cadet martini... but apparently everyone does not agree what is safe and what is not.
Typical conversions where 32-20 (which doesn't work well because of bullet diameter) or 32 Winch special (which may be kicks a bit too much.)
IF these are the old standbys per Frank DeHass, how come a 7-30 slaters is too much for a cadet?

How aout a 23-25? both are virally the same as a 32 winchester special?

How about the .219 zipper, the diameter is the same (its parent is the 30-30).  This one is used a lot to.  I almost bought one are the show from the same guy I bought this one from.

222 Rimmed is half way between the to, similar to the .357 mag/max.

I was leaning to the 357 max figured I could use mag brass and seat the bullets out until I got some brass, but I really liked the 7-30 because brass is so available, until Nero corrected his post about using a full size action for 7-30.

Boy I am confused! 

Also, who is a good source for re-barrel or re-bore?

Is the Martini steel worth re-boring?

Thanks for all the input 

Jerry

Here is some data:
Cartridge      Blt Dia      Neck      Shoulder      Base      Rim      Rim T      Case L      OH L      Twist
.310 Cadet      0.324      0.320            0.353      0.405      0.035      1.12      1.72      
Commonly Recommended                                                      
32-30      0.312      0.326      0.338      0.353      0.405      0.058      1.32      1.59      20
32 Winchester Special      0.321      0.343      0.396      0.422      0.506      0.058      2.04      2.55      16
218 Bee      0.224      0.241      0.331      0.349      0.408      0.060      1.35      1.68      16
Less Common                                                      
25-35      0.257      0.280      0.355      0.420      0.500      0.059      2.04      2.53      8
219 Zipper      0.224      0.252      0.364      0.421      0.497      0.058      1.94      2.26      16
222 Rimmed      0.224      0.253      0.355      0.375      ?      ?      1.70      2.15      14
357 Magnum      0.357      0.379      n/a      0.379      0.440      0.055      1.29      0.51      16-18
357 maximum      0.357      0.375      n/a      0.375      0.433      0.055      1.59      1.97      14
                                                     
Warned against                                                      
7-30 Walters      0.284      0.306      0.399      0.422      0.506      0.058      2.04      2.52      9.5

Frank,
What you say makes sense, I imagine, the 32 special was not such a great Idea when conceived.  If I didn't already have two hornets, I know what I would do.  I wish the 357 maximum brass were more easily available. (for that matter, hornet brass isn't available now either)
Jerry

So does that mean, maybe just us a maximum reamer, use mag cases and set the bullet farther out is the best solution?
If I am using copper barnes bullets, they are going to be long for their wt anyway.

Jerry

I was going to go with a 357 Max on another of my Martini's but because no cases or dies were available I went with the 357 Mag and open sights on an eighteen inch barrel that came off a 9mm Mannlicher. A slugged bullet came out at exactly 357".
Wasn't happy with the open sights so put a Parker Hale peep sight on the rear and a higher and finer blade on the front end because I couldn't get enough elevation and with factory ammo (American Eagle 158 grain jacketed soft points) it will put them into a one inch group at a hundred metres off a rest. 
This one was also a 22 R/F target rifle and has a real nice trigger let off.
These little martini's are fantastic. Quality and one small screw taken out and the whole works will drop out in your hand. Not many rifles you can say that about.
Biased? who me.
Regards.
 

Cherrys has one for sale on the web in 256 Win Mag. Think that's a suitable caliber ?

Boats

I am thinking about a octogon barrel from green mountain and having Mike Bellm chamber it with 357 mag, long throat so I can seat the bullets out further.  Less hassel that dealing with max brass availability.

The octogon barrel should add a nice touch.

Jerry

If I was gonna go with a 357, I'd have it chambered for the max. Brass will not be unavailable forever.

Edbu, I'm currently doing a bunch of shooting w/my Cadet  32 Win. Spcl. w/various cast bullets. I have a Rapine 321155 (140 gr FB) RCBS 120 gr. heeled, a Lee 308 115 bored out and an old Cramer HP 30 carb on the way back from Erik Olean re bored to .322. Today I have the best groups yet (100yds/10 shots) w/ the Rapine and 7 gr Unique/CCI 350 primers/WW 30-30 cases. Most about 1" tall and 2" wide. w/others about 2-3" tall and 1.5 inches wide. Have been trying several different powder/primers but Unique's  the best so far. Loaded 50 more tonight and will shoot em'  tomorrow in 10 shot groups. BTW I mounted a 2.5X Weaver farmer style on it (see gunsmith forum) and so far everything is good. If you have any ideas/input on the Cadet 32 Spcl. (I'll keep posting about my groups) I would love to hear from you on this. GO HAWKS-Muddy