View Full Version : Topper twist rate & bore diameter

02-11-2008, 10:46 PM
Hoping someone here can help me out. I have an old H&R Topper that I picked up decades ago. It has a 20 ga shotgun barrel and a rifle barrel that is marked 22 hornet that has been rechambered to a 219 zipper. I do not have the firearm here so I can't just measure it.

Can someone here tell me what the H&R Topper had for a bore diameter and twist rate on its old 22 Hornet?