If you just want hit indicator then using light weight steel targets with 22LR and using a Hornady Hit Target Indicator could work. On the pistol range at my club they use steel chains to hand the steel. I can mount the HIT unit at the top of the chain to keep it safer from splash. There work reliable with 9mm with the steel chains hangers.

the rifle range the club uses very heavy rubber straps to hang the steel. The smaller steel at 100 and 200 yards still actives the HIT indicators even with the straps but club uses larger steel target as one goes out to 300, 400 and 500 yards. I doubt the HIT indicators would work reliably on the heavier steel at those distances with 22LR. As it was at 300 the indicators only worked some of the time with 22LR. I assume it was based on where I hit the steel with the 22LR.

I am still concerned with splash destroying the hit indicators. I am going to talk with the rifle range director and ask if a mount could be added to the back of the steel so I and others could insert our own wood dowel to offset the HIT indicators so they are behind the plane of the steel and have a solid connection to the steel rather than the heavy rubber strap.

Check out my prior posting for new links to prior discussions. You many not be happy with a cheaper spotting scope at 250m. Many recommend using a better rifle scope rather than a cheap spotting scope.