Ammo for your .351 can be had at Old Western Scrounger. Go to www.ows-ammo.com and click on ammuntion.
Winchester made some that did. Remington also, IIRC.
Any one looking for .351 ammo can find it at Coins Stamps and Guns behind Elwood Epps ,North of Orillia Ont ,on hwy 11.
Find a copy of Madis' book.
It is harder to find anything from Winchester because they went out of business.
You will need to check with a large gunshop, or with an on-line ammo supply company. It IS available- but you will not find it at WalMart. The price of .348 Winchester ammo may be a shock to you- it is about $4-$5 per cartridge.
Google the ammuntion and you will get over 10 pages of possibilites.
winchester
yes, cheaperthandirt.com
No
Winchester Short Magnum
There has been an ammo shortage for over a year as a result of panic buying.