range finders.

Gives confidence, removes guess-work of shots. For example, Wildcat MK3 Sniper .30 consistently put JSB 44.75s in dime-size circle @ 50 yards. From ground blind ranged a crow-preferred pine @ 48 yards. One day large crow landed with thick branch blocking front half. Placed shot just left of branch, crow glided to crash landing, DRT. Rangefinder was key. WM
 
I have two. When I started with PCP-s I ordered cheaper, golf rangefinder. Up to 800 yards as they claim. Works just fine.
When Element Helix 1500 rangefinder came out, I ordered one to be paired with my Element Helix scope. After setting it up (with Element ballistic app) it's game changer. Just measure range and it tells Your hold or clicks to dial. Helix 1500 can be used as regular rangefinder as well.
 
I have a rangefinder but I’ve gotten used to using the parallax wheel on my scope as an analog rangefinder that works pretty well. Find target, zoom in, use parallax wheel to get it perfectly in focus and then I can almost approximate distance using that, as the parallax adjustment on my rifle is usually pretty darn close.

I can set up my paper target at a random distance and get it perfectly in focus with my wheel and then look at the value on the wheel and it’s generally pretty close. Definitely not a replacement for a rangefinder, but could probably be a pretty good judge of distance in a pinch.
 
When I did not want to spend the $80 that most rangefinders cost awhile back, I got a Mildot Master slide rule. Then found a 30 dollar golf range finder, that works just fine for typical airgun distances. Now use a Halo 450 when I remember I have one. I mainly use the FT parallax system dial to get close enough.
 
Yes, a range finder is indispensable, especially using the 7x as a scanning scope to find critters. I use it every time I venture into the wilds with my air rifle.
I had one that was a 1:1 ratio, non-magnification, that worked okay. But the 7x works fantastic and has an adjustable focus when needed. The focus is normally not needed, only when closer than 16 yards for instance. Some times also at long ranges such as 1,000 yards (I don't use it for shooting at that distance of course) when checking something out at long range, like a Golden Eagle on a power pole that inhabits my permission.

mike
 
Indispensable to me as I mainly hunt. Many aspects of my skills have improved over the years but judging distance is not one of them. The $60 "economy" range finder I bought about 8 years ago is still faithfully functional & gets me within 2 yards of more expensive ones I've compared it to.
 
Yes, a range finder is indispensable, especially using the 7x as a scanning scope to find critters. I use it every time I venture into the wilds with my air rifle.
I had one that was a 1:1 ratio, non-magnification, that worked okay. But the 7x works fantastic and has an adjustable focus when needed. The focus is normally not needed, only when closer than 16 yards for instance. Some times also at long ranges such as 1,000 yards (I don't use it for shooting at that distance of course) when checking something out at long range, like a Golden Eagle on a power pole that inhabits my permission.

mike
We're on the same wavelength Mike!
 
I have a 6x rangefinder that gets enough use to justify carrying it around.

I don't trust the ballistic apps. Figure that between the assumptions the app makes, the (dubious) accuracy of the numbers we provide the app to use, the supposed precision of the scope turrets and the current weather conditions, there's a lot of room for discrepancies

I calibrate my scopes empirically, by ranging the target and applying the turrets stickers. Later when pesting, I know for sure that 60 in the rangefinder equals 60 on the scope and I dial to take the shot. This may not be a perfect solution but it minimizes the variables and most of all I have confidence in it. Works for me.

Whether "60" is a real and accurate number doesn't matter as within the repeatability of the whole system (rifle, scope, projectile and ME...mostly me 😉 ) we are all in synch.

So, the short answer is that when shooting at unknown distances, any shot beyond "point blank" (45ish yards) is "ranged" if time permits.

Cheers!