Originally Posted by
Storm
Adding the can will change your POI, but the precision should be consistent, if not improved. Re-zero the gun with the can on it. Write down the difference in elevation and windage/azimuth settings, so you can re-zero the sight(s) on the fly, when you are swapping the can on/off.
Yea, you will get some extra noise from the breach as the gun cycles. This happened on my .22LR, which bugged me, but I was going for uber-quiet with that round. I ended up getting a bolt-action. With a super-sonic rifle round, there's going to be noise either way.