Thread: Long Range Shooting and TBR

Im interested in hearing from people that use BDC turrets and TBR ranges successfully at long range?

I use a BCD turret and my basic rule of thumb for 10° to 15° shots out to 600 yards is that I always subtract 1 click.

If the shot is 15° and over 550y I always subtract 2 clicks.

For anything that's steeper than 15° or past 650y - I enter the angle into shooter and make an adjustment from there.

I have been using this method very successfully for years, but now i'm interested in how accurate TBR ranges (that I believe are simply based on the 'rifleman's rule') actually are at 700y and beyond.

You would think that your own ballistics and atmospheric data would need to come into any range adjustments due to shooting at an angle at long range wouldn't you?

Any thoughts?

I always use the TBR reading straight from the rangefinder then you dont have to worry about entering angles into shooter that way.
The lower angles wont make a huge difference but out in the real steep stuff it makes a big difference.

https://guns.ptosis.ch/ru/node/1

Originally Posted by chalkeye

https://guns.ptosis.ch/ru/node/1

That’s a great article thanks.

I’ve done the calcs using TBR compared to the actual range, angle, pressure etc. pretty much no difference out to 650ish yds, which is as far as I’ve shot it.

Originally Posted by stug

I’ve done the calcs using TBR compared to the actual range, angle, pressure etc. pretty much no difference out to 650ish yds, which is as far as I’ve shot it.

ive got an oldish rangefinder without tbr and was going to upgrade but now that you have said that i might not be able to justify doing so, bugger

To me it’s only worth using the TBR setting if you’re running a custom turret with yardage increments or using a ballistic reticle for hold over.

Otherwise you may as well just enter the usual line of sight range and the shot angle into a ballistic app.

Tbr and a kestrel 2700 or if wanting bells and whistles the 5700.
The most accurate and quick and reasonably priced ballistic solutions.
After that series bucks if your getting serious

Sent from my SM-A025F using Tapatalk

@Jamo I would upgrade. I use to have a Leica 900 now have the 1600b. I just range, look at my drop chart and dial. I use to have to range, open my phone, open the app enter range, enter the angle, look up pressure on my watch, enter that, get the solution, then dial.
TBR definitely quicker. I just have an MOA dial but it is still quicker.
I did my drop chart for standard pressure and at sea level.

The best solution so far is the Sig system where the range finder talks to the scope. Push the button on the range finder and it lights up the correct dot in the scope.

For those that are interested I have done some calculations and compared bullet drops for (TBR distance solutions) against (line of site distances AND angle solutions)

650y @ 10° using TBR I would be shooting 41mm too low.
650y @ 15° using TBR I would be shooting 81mm too low.
650y @ 20° using TBR I would be shooting 140mm too low.

Yeah nah..

Really depends what you consider "long range".

At 1000m EVERYTHING starts making a pretty big difference.

Even a 100mm plate @ 300m if placed at a severe enough angle can easily trip up most punters. Very common to see guys miss 3 MOA or larger plates when you present them with a 25 or 30 degree angle.

BDC reticles are great for hunting style comps. For anything medium range (750m) or long (1000m plus) you are much better off with dialing, or a FFP reticle. Not just for initial hits, but also to make accurate corrections for subsequent shots.

A simple rule of thumb is that the width of your fist (across the knuckles), held at arms length, is roughly 10 degrees. It works surprisingly well.

The way I've had it explained to me is that TBR doesn't account for the bullet having to push through the LOS distance of air. An uphill 600m shot might have a TBR of 550m but the bullet's still got to push through 600m of air, slowing (and dropping) accordingly.

Originally Posted by ebf

Really depends what you consider "long range".

At 1000m EVERYTHING starts making a pretty big difference.

Even a 100mm plate @ 300m if placed at a severe enough angle can easily trip up most punters. Very common to see guys miss 3 MOA or larger plates when you present them with a 25 or 30 degree angle.

BDC reticles are great for hunting style comps. For anything medium range (750m) or long (1000m plus) you are much better off with dialing, or a FFP reticle. Not just for initial hits, but also to make accurate corrections for subsequent shots.

A simple rule of thumb is that the width of your fist (across the knuckles), held at arms length, is roughly 10 degrees. It works surprisingly well.

Yeah I think TBR is great for anyone wanting to shoot out to 400m

Beyond that IMO it's faster and more accurate to..

1. Take a 'line of sight' range and an angle (if your range finder displays angles)
2. Refer to your drop chart that has columns for 10° 15° 20° bullet drops (customise this to the angles you typically encounter)

IF you use a BCD or CDS turret, you won't need to refer to a drop chart but you will need to have an idea of how many clicks you need to subtract based on ranges and angles.

Originally Posted by Tui4Me

Yeah I think TBR is great for anyone wanting to shoot out to 400m

Beyond that IMO it's faster and more accurate to..

1. Take a 'line of sight' range and an angle (if your range finder displays angles)
2. Refer to your drop chart that has columns for 10° 15° 20° bullet drops (customise this to the angles you typically encounter)

IF you use a BCD or CDS turret, you won't need to refer to a drop chart but you will need to have an idea of how many clicks you need to subtract based on ranges and angles.

How can it be faster to input 1 distance (TBR) than a distance and angle? Makes no sense, or are you implying after 400m TBR rangefinders are inaccurate?