Didn't have any problem with mine. I originally purchased a 45-70 barrel (ejector) from one of the member on this board. It snapped right into an older SB2 receiver I had laying around. I found it to be really accurate.
I was so happy with it that I went out and purchased a complete 45-70.
I also purchased another 45-70 barrel and had it converted into a smokeless Muzzleloader. Guess you could say I like the 45-70.
Don't know why, but the 45-70's along with a few other H&R barrels (30-30, 357, 22LR, to name a few), just seem to be inherently accurate.
A word of advice, BUY IT! Besides, if you don't own a Handi in 45-70, you'll never learn the "super secret squirrel handshake".