Jump to content
UKV - The Place for Precision Rifle Enthusiasts
oaken

Bullet drop charts for Sightron

Recommended Posts

I got rained off last week so, inspired by Brown Dogs BDC wraps for the PM2s, I sat down at the computer and made myself up some charts to stick on the turrets of my Sightron scopes.

I got a new 6-24 recently and have several times got lost (I am easily confused under pressure) in the 7 turns and 100mins of elevation while dialing long ranges. So I felt compelled to simplify things as there is no zero stop on these scopes.

My chart covers the elevation turret with a new moa chart and 50yd range increments out to 1200yds. The attached picture shows the elevation set to 1000yds which for my load is 36.5moa. I cant believe how easy it makes dialing in and wish I had done this years ago. As BD says its FAST!!!

I have made them up for both the tactical turret and the target type with the screw on covers.

Took lots of faffing about to get them to fit but they are now saved safely on my computer.

Rup

2012-05-20160142.jpg

Share this post


Link to post
Share on other sites

Nice one oaken ill contact you later on in the week

Share this post


Link to post
Share on other sites

I also get easily confused with the multiple turn turrets, especially as I am used to a S&B PMII with a mechanical zero of just one click under 100m. On my Nightforce I machined a ring to act as a physical stop to go under the turret. I set the drum to my zero and measured the gap under the drum to the body then machined a spacer ring out of aluminium. Unscrew the drum, drop the spacer which is really just a very fine ring over the inner drum, and fit the turret again, it took me a couple of goes with some very fine wet and dry to fine tune it to a couple of clicks under my 200m zero. Now I know that when I screw the drum down and it stops it is just a tad under my chosen zero.

 

It is fair to say it has not stopped me turning my windage drum the wrong way in the past....:wacko:

Share this post


Link to post
Share on other sites

It is fair to say it has not stopped me turning my windage drum the wrong way in the past....:wacko:

 

 

I really like the idea of a collar made up as a zero stop. Anything that makes adjusting a scope easier or more simple has to be a good thing.

Share this post


Link to post
Share on other sites

Hi Oaken i am very impressed with what you have done looks really good could you pass it on to me if you dont mind thanks

Share this post


Link to post
Share on other sites

Turn it left, right. What, left then right? No just left. Which left? The right one of course!

Sorry..........

I really like the idea of a collar made up as a zero stop. Anything that makes adjusting a scope easier or more simple has to be a good thing.

 

Bizarrely topical - I've just this minute finished updating my wraps for CZ week after next (you'll see I've gone for functional over aesthetic :lol: )

 

P1010123850x568.jpg

 

The only way I seem able to reduce brainfart left and right dialling errors is to colour code port and starboard

 

- wind on the port side, red numbers; wind on starboard -green numbers

 

P1010126708x850.jpg

Share this post


Link to post
Share on other sites

I saw someone who did a similar strip around his elevation drum and he put a 10mph wind setting over each elevation distance to allow quick wind dialling too.

Share this post


Link to post
Share on other sites

Nice one Rup, you have a PM.

Tony.

Share this post


Link to post
Share on other sites

I did the same for my Bushnell, best, fastest, way to keep ballistic info by a mile I think, it shortens the process to a direct range->firing solution, why faff around with mils etc in the middle?

 

I'm hopefully just about to swap the Bushnell for a Sightron though, I may be in touch!

Share this post


Link to post
Share on other sites

is there software out there that gives distance to click output, stuff i have only has clicks to distance output, if tha makes sense.

 

would like to produce label for my scope with exact distance to achch click... same as brown dogs.

 

cheers

Share this post


Link to post
Share on other sites

Yes.

Try JBM ballistics for pc.

Isnipe ap for iphone.

Shooter ap for android.

All require accurate input to produce accurate output!

Share this post


Link to post
Share on other sites

is there software out there that gives distance to click output, stuff i have only has clicks to distance output, if tha makes sense.

 

would like to produce label for my scope with exact distance to achch click... same as brown dogs.

 

cheers

 

What brand of scope and click value are you on?

Share this post


Link to post
Share on other sites

The only way to make a chart exactly Gary is to shoot your rifle at various distances (known distances) on the same day, (same temp, humidity, elevation, etc) then send data to BD for a chart, you can then make a sheet to cover the turret at known distances like the ones posted.

Share this post


Link to post
Share on other sites

What brand of scope and click value are you on?

 

its a nightforce 8-32x56 1/4 moa clicks, due to arrive tomorrow!!

Share this post


Link to post
Share on other sites

its a nightforce 8-32x56 1/4 moa clicks, due to arrive tomorrow!!

 

Gary, sorry can't help you with a wrap for a vernier turret, I think a couple of fellows on here knocked them up for NFs.

Share this post


Link to post
Share on other sites

If you want a wrap, I need to know if your sightron has tactical knobs or target type with the screw on dust caps. They have different circumferences.

I can produce a wrap marked with distances from your bullets ballistic coefficient and velocity BUT that doesn't allow for exaggerated manufacturers bc claims, inaccurate chronographs and subtle variations in your scopes click values,not to mention atmospheric conditions, so could be a long way out. I have seen Brown Dogs charts and thoroughly recommend them for BDC data.

Once you have a proven data set for that bullet/scope/conditions, I can work from that.

I would normally produce a drop chart with average atmospheric conditions.

Variables can be applied when/if needed.

Rup

Share this post


Link to post
Share on other sites

These wraps are excellent! Rup sent me a few to try. An elevation wrap matching my 17 Rem drop and a generic windage wrap. The windage wrap is on my 8-32 for the 6.5x47 and elevation was made for my 6-24 SIII on my 17 Rem for quick elevation dialling on vermin out to 450yds. I found the windage wrap on the 6.5 excellent. The S3 counts to 15 MOA in one direction which I find very annoying so I stuck on labels to meet in the middle (at 7.5).  This was greatly floored as I pushed out the range on windy days as an excess of half a revolution (7.5MOA) is often required. With the added windage wrap that counts a full revolution both ways I was easily able to keep track of my windage dialling and did not get lost despite up to 12 MOA being required. 

I've only had 2 shots to test the elevation turret wrap on my 17. One was a rabbit at 330yds that I shot from the truck and it was very quick to adjust after ranging it. I will report back in more detail once I've used it more.

Many thanks Rup and keep up the good work. 

Regards

Si

Share this post


Link to post
Share on other sites

Here is a brief video I made today attempting to explain the turret wrap I fitted last week. Hope it does the wrap justice. :D

Share this post


Link to post
Share on other sites
Guest richness

Big fan of improving the little things to make big differences.

Oaken I'll be in touch re my S3 tactical 6-24 for both dope and your much more sensible windage turrets markings that count both ways properly (one of the things i like best on my IORs)

Good luck to you sir

Richard

Share this post


Link to post
Share on other sites

Thanks Si, now thats what I call feedback :)

No problem Richard, just need your drops in 25yd increments

Rup

Share this post


Link to post
Share on other sites
Guest richness

Grand, will do thanks.

Was using Si's at the weekend and they come thoroughly recommended

I'll PM you details shortly mate

Rich

Share this post


Link to post
Share on other sites

hi

is anyone able to give a tutorial on how to do this,what program to use and how to go about it,if so i would be very gratefull.

thanks

Matt

Share this post


Link to post
Share on other sites

I use an old copy of Adobe Pagemaker and input the data manually.

The hardest part is getting the scale right so they fit exactly!

I considered doing them for other scopes but I really can't be ar*ed to set the whole thing up for different sized turrets.

Rup

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

×

Important Information

By using this site, you agree to our Terms of Use and Privacy Policy