My LCRx3 new out of the box was shooting low about 4" @ 25'. Raised the back sight all the way up and it helped a lot, but I didn't like the back sight up all the way, like the very last threads of the screw was holding it in place. Plus it's very springy at that height. So what I did, instead of filing down the factory front sight, I went to theShopRuger
site and ordered an LCR 22 front sight
which is shorter than the LCRx3 factory sight and changed it out. Now it shoots fine and I got to lower the back sight to close to bottom, the back sight feels in place and secure. Another plus is, it looks better having a lower front sight. After some adjusting with the back sight height, shot 4 rounds in a 1 inch group with one flyer out 2", thats standing w/o rest. Shot Winchester FMJ 130 gr. also Rem jacketed hollow pt 125 gr +p's.
Please Ruger, put this LCRx3 out in 22 mag!!