Welcome to the world of 32's! As I said - cheap to reload and fun to shoot. 32 long components are easy to find. If the gun is eventually found to be accurate 32 H&R will do a job as a varmint round. If not accurate with longs I would not expect it to magically become accurate when rechambered to magnum.

Since te barrel pedigree is unknown I would try as many lead and jacketed loads as possible. I'd even try 32 ACP bullets and 32 caliber round balls. Something might work really well. Best case is if you can buy a few bullets from a buddy versus purchasing 100's of every type.