Vudoo 22S, Harell Tuner Hopewell Method UPDATE 3/18

[garandman]

Vegas -

Maybe I got lucky but I found and re-tested the 200 setting in 50 rounds.

 

[Hi-NV Shooter]

Vegas -

Maybe I got lucky but I found and re-tested the 200 setting in 50 rounds.

Possibility, but how many times have you shot that setting since finding it? not saying that is not the one you are good and done at.
but try and shoot other lots to see if it holds up.

Lee

 

[garandman]

Possibility, but how many times have you shot that setting since finding it? not saying that is not the one you are good and done at.
but try and shoot other lots to see if it holds up.

Lee

Yes, of course. I intend to attempt to "falsify" this setting.

 

[Hi-NV Shooter]

Yes, of course. I intend to attempt to "falsify" this setting.

Sounds good, post your findings.

Lee

 

[garandman]

Revisiting the ammo speed and tuner setting issue… it's my understanding that variations in ammo speed will create a different harmonic.... e.g., 326 m per sec will create a different harmonic than 328 m per sec...

If that's true I would speculate that a different tuner setting would be required for a different speed ammo, but I'll test it once I find my sweet spot for this 326 m per sec ammo.

 

[grauhanen]

Without attempting to stoke controversy, regarding tuner settings, there's a school of thought supported by evidence that says that, while there are several tuner settings that will see improved results, there is one "best" setting that will shoot a variety of ammos without requiring further tuner adjustment. The key is to find that best setting through testing.

 

[kthomas]

@garandman do you see a noticeable and repeatable improvement in precision with the tuner versus shooting the ammo with no tuner in your specific rifle?

 

[garandman]

@garandman do you see a noticeable and repeatable improvement in precision with the tuner versus shooting the ammo with no tuner in your specific rifle?

I only ran about 500 rounds thru the gun b4 putting the tuner on. At 100 yds, w/ no tuner, the gun would shoot like this, with teh same lot of Midas +

 

[Hi-NV Shooter]

Revisiting the ammo speed and tuner setting issue… it's my understanding that variations in ammo speed will create a different harmonic.... e.g., 326 m per sec will create a different harmonic than 328 m per sec...

If that's true I would speculate that a different tuner setting would be required for a different speed ammo, but I'll test it once I find my sweet spot for this 326 m per sec ammo.

grandman, no lot of ammo will have the rounds shooting the same speed( unless you find that holy grail of killer lot) really good lots have the smallest deviation on the fps spread between rounds.
so finding a setting that will shoot the widest spread is what you want. so a setting that can shoot say 326-330 with minimum spread of half a bullet or less in POI is probably the best setting for that barrel.

Lee

 

[grauhanen]

Lee makes an important point. Match ammo with an ES under 30 fps can often be hard to find.

 

[garandman]

grandman, no lot of ammo will have the rounds shooting the same speed( unless you find that holy grail of killer lot) really good lots have the smallest deviation on the fps spread between rounds.
so finding a setting that will shoot the widest spread is what you want. so a setting that can shoot say 326-330 with minimum spread of half a bullet or less in POI is probably the best setting for that barrel.

Lee

That's a fair point.

When I run out of this lot I'll likely have to find another tuner setting. I only shoot 1 match per week, max. What I got (3,000 rounds) should last me 2 years, maybe 3. I might be dead by then anyway. I got some 328 Midas + to mess around with, so I'll test that and if I can get that to shoot good, my LGS has a good supply of that lot #, AND I'll grab a bunch.

I'm a recreational shooter (at most) and not shooting 500 rounds per week, so I'll cross that bridge when it comes up.

 

[Hi-NV Shooter]

That's a fair point.

When I run out of this lot I'll likely have to find another tuner setting. I only shoot 1 match per week, max. What I got (3,000 rounds) should last me 2 years, maybe 3. I might be dead by then anyway. I got some 328 Midas + to mess around with, so I'll test that and if I can get that to shoot good, my LGS has a good supply of that lot #, AND I'll grab a bunch.

I'm a recreational shooter (at most) and not shooting 500 rounds per week, so I'll cross that bridge when it comes up.

You shouldn't have to re-tune if the 200 setting is the one for that rifle.

Lee

 

[garandman]

Did more testing.... 200 /210 Harrell setting.... Midas + / Center- X...

 

[Hi-NV Shooter]

Did more testing.... 200 /210 Harrell setting.... Midas + / Center- X...

garandman, Question did you just set it at 210 or did you sneak up to that setting? mean starting at 200 shoot a group, than at 201, 202, etc. though 210 doesn't look to be what it likes, could be a setting between 200-209 however looking at that one group with the vertical dispersion I suspect the setting to be above 210
also is there any significance on why you denoted the 5th shot of that group?

Lee

 

[garandman]

Lee -



Thus far I've gone from 0 to 300 by Increments of 25. I found decent groupings around 25 and around 200. So I'm trying to dial those in with finer increments. I have been able to repeat decent groupings around 25 and around 200. I just don't think I found the perfect sweet spot yet..

 

[garandman]

It was a significant tail wind switching between 10 and 2 o'clock the entire session. So the vertical dispersion could have been just a badd wind read on my part.

 

[Hi-NV Shooter]

Lee -



Thus far I've gone from 0 to 300 by Increments of 25. I found decent groupings around 25 and around 200. So I'm trying to dial those in with finer increments. I have been able to repeat decent groupings around 25 and around 200. I just don't think I found the perfect sweet spot yet..

garandman, Have you tried going by 1-click increments up or down from those settings? might be hard to believe but that setting you are after may only be 1-2 clicks away from on that is shooting good now

Lee

 

[Hi-NV Shooter]

It was a significant tail wind switching between 10 and 2 o'clock the entire session. So the vertical dispersion could have been just a badd wind read on my part.

That makes sense

 

[garandman]

garandman, Have you tried going by 1-click increments up or down from those settings? might be hard to believe but that setting you are after may only be 1-2 clicks away from on that is shooting good now

Lee

That's the plan. I think that's what the Hopewell method recommends.. start w/ large 25 / 1000ths adjustments, then progressively smaller "fine tuning." . Kinda like dialing powder in in 0.1 gr increments for CF. Tiny adjustments can make a big diff. . I'm not done, by any means. Not till I get consistent 0.30" outside to outside 5 - shot groups.....and the gun can always shoot bulls on the ARA target.

 

[jjhall91]

A little off topic, but is a tuner more noted for improving accuracy (help shrinking group size) or consistency when groups are already acceptable? Maybe both?