Resources Creating Dope - my stubborn way

[cavedweller]

This a fine tuned and adjusted "Chair gun" created dope card.
While hold values are in 100ths ( 2 decimal places ) it does allow knowing the EXACT theoretical POI in "Mils" as viewed threw optics.
Any thing 4 yards +/- or more off my 25 zero i start leaving the center of KZ and do not make the mistake the Zero range is as broad as many assume it to be. Errors in ranging distance, poor lighting or beat out KZ's can and will bite you !! Free wisdom

View attachment 492146

Best price ever!

 

[cavedweller]

I use PPCalc, shoot 4 distances including my zero distance (10,27,40,55), then print out this chart, check it and make tiny tweaks to the BC to get everything to line up, then adjust my spreadsheet and go from there.

View attachment 492788

Nice!

 

[imtrigerhapy]

What i have done is take a big box shoot 10 yd at top and this is the important part....have my son move box 5yd further and repeat till done. I get a dope card son burns a little of the endless energy when all done measur box for holdover

 

[Ezana4CE]

@cavedweller are you using a tape measure to measure your half yard? After how many yards movement (forward or backward) are you adjusting your parallax wheel?

 

[cavedweller]

What i have done is take a big box shoot 10 yd at top and this is the important part....have my son move box 5yd further and repeat till done. I get a dope card son burns a little of the endless energy when all done measur box for holdover

For a second I thought you were going to have your son do the Robin Hood thing

 

[cavedweller]

@cavedweller are you using a tape measure to measure your half yard? After how many yards movement (forward or backward) are you adjusting your parallax wheel?

Yes I use a tape measure to lay out stakes and markers from where the front of my scope will rest.
I use 36” tall electric fence wire posts for the full yard markers and a shorter flat galvanized stake for the have yards
I start at 9.5 yards because I have been on FT courses where the target was closer than 10 yards.
I mark my parallax wheel every 1/2 yard until I reach my apex and also my zero usually by 23-27 yards most of my .177 Hft rigs are zeroed in between 21-30 yards to avoid hold unders.
When I’m ranging I’m pretty accurate until 35-40 yards then it’s hard to distinguish between the 5 yard intervals.
Old pictures but you get the idea.

 

[Ezana4CE]

Yes I use a tape measure to lay out stakes and markers from where the front of my scope will rest.
I use 36” tall electric fence wire posts for the full yard markers and a shorter flat galvanized stake for the have yards
I start at 9.5 yards because I have been on FT courses where the target was closer than 10 yards.
I mark my parallax wheel every 1/2 yard until I reach my apex and also my zero usually by 23-27 yards most of my .177 Hft rigs are zeroed in between 21-30 yards to avoid hold unders.
When I’m ranging I’m pretty accurate until 35-40 yards then it’s hard to distinguish between the 5 yard intervals.
Old pictures but you get the idea.
View attachment 565732
View attachment 565731

@cavedweller Wow! That’s a pretty elaborate system. Thank you for explaining. Targets closer than 10 yards? Are they legal for competition?

 

[cavedweller]

@cavedweller Wow! That’s a pretty elaborate system. Thank you for explaining. Targets closer than 10 yards? Are they legal for competition?

no - not legal as 10 yards is supposed to be the closest for HFT, but that's of little help if you show up and range at 9.5 yards or 57 yards.

 

[PowderBurnt]

Yes I use a tape measure to lay out stakes and markers from where the front of my scope will rest.
I use 36” tall electric fence wire posts for the full yard markers and a shorter flat galvanized stake for the have yards
I start at 9.5 yards because I have been on FT courses where the target was closer than 10 yards.
I mark my parallax wheel every 1/2 yard until I reach my apex and also my zero usually by 23-27 yards most of my .177 Hft rigs are zeroed in between 21-30 yards to avoid hold unders.
When I’m ranging I’m pretty accurate until 35-40 yards then it’s hard to distinguish between the 5 yard intervals.
Old pictures but you get the idea.
View attachment 565732
View attachment 565731

That looks too nice. You should be guessing what it says after the ink starts smearing, just like me. Lol

 

[Motorhead]

no - not legal as 10 yards is supposed to be the closest for HFT, but that's of little help if you show up and range at 9.5 yards or 57 yards.

Yup, my D.O.P.E. cards always go 9 & 56 yards. and every yard in between. This is especially important inside 18 yards as being able to split yardages & hold can make the difference when KZ size holes get rather small

 

[cavedweller]

That looks too nice. You should be guessing what it says after the ink starts smearing, just like me. Lol

I also hang different textures and bobbly things with different colors like pine cones Xmas ornaments at the 1 yard intervals… gritty / rusty surfaces create solid ranging effects also

 

[cavedweller]

Yup, my D.O.P.E. cards always go 9 & 56 yards. and every yard in between. This is especially important inside 18 yards as being able to split yardages & hold can make the difference when KZ size holes get rather small

EMD = evil match director

 

[Ezana4CE]

Yup, my D.O.P.E. cards always go 9 & 56 yards. and every yard in between. This is especially important inside 18 yards as being able to split yardages & hold can make the difference when KZ size holes get rather small

@Motorhead What do you mean by "...being able to split yardages?"

 

[PowderBurnt]

@Motorhead What do you mean by "...being able to split yardages?"

He's just splitting hairs.

 

[BBGunn]

Yup, my D.O.P.E. cards always go 9 & 56 yards. and every yard in between. This is especially important inside 18 yards as being able to split yardages & hold can make the difference when KZ size holes get rather small

As your elevation dope needs to be so refined..., how do you FT guys deal with rifle POI change due to large ambient temp change over the course of the match?

For my squirrel rifles, I see about a 10fps change over a 30F swing in ambient temp.

 

[Motorhead]

EMD = evil match director

I too must shoot what is set up ...

@Motorhead What do you mean by "...being able to split yardages?"

Say you have a 3/8" at @ 13 yards for most who range it, but actually closer to 12 1/2 or perhaps closer with good optics and actually more correct. You look at your 12y and 13y and split the difference to take the shot.
This bites many people in that there still aiming center of kz !!! and knowing most won't range it further, the error is if actually closer your going to miss it !!!
Why ? ... because by aiming at the center of Kz on any small target you only have in this case a 3/16" below center where aimed ( Being .187" and a typical FT rig is .177 ) If even a calibers diameter lower and not steady could cause a split.
*So, when closer especially ranging errors typically fall that target is closer & not further, aim above center of Kz slightly & use split yardage averages when noted range is not quite on the ranged yard.
Same thing at distance once past ZERO range especially 40y on out.. Errors generally become distance might be greater than read and if still in the middle of Kz the shot may fall short. .. and you have another miss.

As your elevation dope needs to be so refined..., how do you FT guys deal with rifle POI change due to large ambient temp change over the course of the match?

For my squirrel rifles, I see about a 10fps change over a 30F swing in ambient temp.

POI does not shift enough on a given day generally with air density to even think about IMO ...
Some Optics however DO SHIFT in many scopes with large temperature changes & that is where the error at POI is coming from in most instances. Ranging error created at the optics & not some radical BC change due to an air density difference. IMO

 

[PowderBurnt]

As your elevation dope needs to be so refined..., how do you FT guys deal with rifle POI change due to large ambient temp change over the course of the match?

For my squirrel rifles, I see about a 10fps change over a 30F swing in ambient temp.

Spray and pray. If you can see where your POI is, adjust for it. It's happened to me too often.

 

[Motorhead]

Spray and pray. If you can see where your POI is, adjust for it. It's happened to me too often.

Your going to LOVE the OREGON STATE FT match then One shot per target, seeing where missing hoping to pick up your second won't be happening !!!!

 

[BBGunn]

Your going to LOVE the OREGON STATE FT match then One shot per target, seeing where missing hoping to pick up your second won't be happening !!!!

Now that's a 'mans' game right there!

 

[Motorhead]

Now that's a 'mans' game right there!

If nothing else it quickly weeds out the unprepared