Anyone have a H&R .38-55 "Target" model? Need help with groove diameter.

Slug the bore lube a pure lead slug drive it about an inch in muzzel end then tap it back out measure with calipers do this carefully with a brass dowel taking care not to damage muzzel . correct slug size is probably .375
 
Should be .379 but most jacketed bullets are .377 Lee makes a 250gr .379 mold Although some modern versions do indeed sport .375 bores.........one way to find out check out castboolits.com Harold
 
I also picked up a discontinued Lyman mold 375296 GC. A double cavity mold 260gr.Forster makes a HP outfit that looks like a casetrimmer to enhance expansion for cast projectiles....................Harold ** bullets drop out at about .380"
 
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For plinking and small game [grouse] some load a .380 ball with 4-5 grains of pistol powder Unique..................Harold
 
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