I put a new liner in a .22 Hopkins falling block ( (You need to Login or Register to view media files and links))  Used a liner rifled for .22 LR.  Trying it out with .22LR 40 grain and .22CB caps 29 grain. The CB caps are hitting 2.5 to 3" left.  .22LR hit center, right on, but the CBs are all striking left.  Elevation is fine, just the windage problem.

As expected, the CB groups aren't as accurate as the LR, but the real issue is they are so far left.  What gives? 

Ironically, my primary rifle is an Winchester 1890 rifle chambered in .22 Long, with a poor bore from the black powder era.  It groups LR much better than CB or Longs, and all shoot to the same center. 

I'd like to shoot the CBs, because they are quiet enough for my neighborhood, but if they are going to shoot "off the grid" then it's a no-go.

Joe

You might try some CCI Quiet .22 lr.  I shoot that in my back yard and the bullets hitting the steel trap make more sound than the rounds going off. 

Jack

Agree with the others better to switch ammo than extreme sight adjustment.   I still have CB 22’s on hand use them when working on firing pins. Check for proper strike out the shop door 

Boats