Good question .
There are many different ways to fix this issue . Most production companied now place a tension spring under the barrel . This is normally held in place by either the front lock bolt or the from barrel pin .
This works but it requires having a cut out to the RR channel or as in some cases an exposed length of the RR channel under the barrel .
Myself I don’t like this , but its how they do it .
Now most certainly one can make a warp in the RR to help hold it in place . Basically what’s being don is the warp creates tension. Thus friction to hold it in place .
Here is what I do to fix this issue when folks bring me a rifle with this problem . It works with all RR , wood , brass , synthetic .
Take a a piece of wood . Simple pine works but hardwood works better for this .
Make a small sliver shim . not very long just about ¼ or 3/8 is long enough .
Take the entry thimble off . If you don’t have one then that’s ok to .
Now put the RR in place and fit the shim . You want it snug but not so snug that you cant get the RR out . Yet you want it snug enough that you have to apply alittle presser to pull the RR .
Once you have this made and are satisfied . , glue it in place , just Inside the entry hole .
don’t push it so deep that you cant get to it if sometime down the road , you need to replace it .
Now replace the entry thimble and your good to go .
If you don’t have an entry thimble , then just put it about a ¼ inch back so it cant be seen .
What this does is but pressure against the rr . IE making a spot where the RR must go over in order to slide past . Now you have a spot that creates the same friction as bending the rod . But it doesn’t look like you have a FISH ON!!!!! Situation when you pull the road , granted that’s an exaggeration LOL
But you get the point .
The shim will last a very , very long time . I have one in a couple of my personal rifles , one has been there now for 17 years and is still working well .