1k tune at 100

[One Shot One Thrill]

Where are you located?

Ga.

 

[nmkid]

You are very lucky. It appears you have found the secret to a problem countless shooters have been searching in vain for.

 

[One Shot One Thrill]

You are very lucky. It appears you have found the secret to a problem countless shooters have been searching in vain for.

I assure you it is an ongoing quest. As conditions change so does the tune.

 

[JimSC]

it's just common sense that a .5 group at 1000 would be a .3 or smaller group at 100, dog bites man. Now a .5 group at 100 turning into a .3 group at 1000 would be man bites dog. The consistency of the velocities and the physics of the bullet will affect grouping at longer ranges but they will never make the bullets group tighter only looser. If I ever had a load group tighter at 800 I would chalk it up to either luck at 800 or crap shooting on my part at 100.

 

[alinwa]

Jeeepers, gotta' get me one a' them PRS's and take that class....... I be FIGHT to get them 3"ers with my 65lb 300WSM using the big March 8-80 scope and treating each round like a Thee Sacred Chalice of Nevermoore............ that's about 13 Grand I woulda'coulda' not spent......


JUS' sayin'......

 

[Sheldon N]

Same process you outlined in this prior thread?

http://forum.accurateshooter.com/threads/consistency-repeatability.3956353/

As a shooter I enjoy reading the diversified theories and practices to achieve ones own goal. In my findings there are many ways to achieve the end result but it must be repeatable. I'm always looking for a better way. I'm fortunate enough to spend more time on the range than most. Recently I have used the terminal velocity to aid with load development. I have found this information extremely surprising/valuable. With this info I can assess each bullets BC and determine when it effects the location impact on target. This has greatly reduced the number of shots required to determine a load. With the historical DOPE I have found I can produce a great load in less than 10 shots. This process has proven itself with 7 setups thus far from PRS to Benchrest Setups. It has been the most consistent and repeatable process for me to date. I am curious if anyone else is currently using terminal velocity in load development?

....

It is pretty simple as I have to practice the KISS method.
I generally start with the projectile at or near 0 in relation to the lands. I already have an idea on starting powder charge and I always start low. I do not concern myself with velocity as long as I'm within 200 fps of what the cartridge is capable of and I don't mean max. Depending on case size I adjust my charges accordingly example for 300 wsm I adjust in half gn increments. I only load 1 of each charge. I then fire them with lab radar at muzzle and electronic target captures speed at target. It is extremely easy to see/record what is happening. Usually I'll find 3 points with very little vertical that's all I'm looking for. At 1k it's .7 or less. I then load up 3 each of the different charges fire for group once again easy visual report. Note with the terminal velocity you can detect a bullet with a different BC. Every bullet has its own BC.
Then some final tweaking and I'm done.

 

[One Shot One Thrill]

Jeeepers, gotta' get me one a' them PRS's and take that class....... I be FIGHT to get them 3"ers with my 65lb 300WSM using the big March 8-80 scope and treating each round like a Thee Sacred Chalice of Nevermoore............ that's about 13 Grand I woulda'coulda' not spent......
The 300wsm heavy gun is actually the easiest one to achieve 3" in my opinion.

JUS' sayin'......

 

[One Shot One Thrill]

Same process you outlined in this prior thread?

http://forum.accurateshooter.com/threads/consistency-repeatability.3956353/

Yes

 

[A Lewis]

I have personally been to Eric’s range and seen this with my rifles and watched it happen with others. This method flat out works. It has been done over and over again with different builds from different smiths.

Paper don’t lie

 

[22DASHER]

You are about to make a TON of money if this works!

 

[One Shot One Thrill]

You are about to make a TON of money if this works!

I seriously doubt I can ever come close to breaking even for what I have invested.
It has worked on every rifle that I've tried it on so I'm confident it will work on the vast majority. I will offer anyone that wants to try it the same one I made earlier come to the range give it a try if it don't work you had a free day on the Range and a lot of fun in the process. One thing I'm sure if it does work it'll be the best $250 you ever spent.

 

[Dusty Stevens]

How small are we talking at 100 when you say small? And if you were able to tweak it a bit at 100 to get smaller, would it be even smaller at 1000? Why do people say the smallest group at 100 may not necessarily be the best at 100

 

[Sheldon N]

So it appears that you're using the e-target to verify shot position and consistent vertical, just like a traditional ladder test. How does the terminal velocity factor into the equation? Are you looking for velocity "flat spots" in the speed at the muzzle and at the target?

 

[Ned Ludd]

With the exception of being able to do it in 10 rounds, many F-Class shooters have loaded using something similar to this approach for years. I have little feel for how it would fare in the BR world, I don't shoot BR. In F-Class however, consistent velocity and reasonable precision over the long strings of fire are of significant benefit. Absolute precision usually won't be the limiting factor as wind changes over the 20+ shot strings usually account for the majority of dropped points. In other words, you're likely to drop as many points with a tuned load that shoots in the 0.1s as opposed to the 0.2s, or even low 0.3s, because pure precision isn't the limiting factor if there's much wind at all.

Now, being able to achieve all that in 10 rounds would be a definite bonus. I'm sure there are many that have observed very early in the load development process that some combinations just seem to want to group exceedingly well as compared to others. Nonetheless, that is usually just intuition, not necessarily definitive. If I could could consistently accomplish that goal in 10 rounds, I own enough competition rifles that I might never burn out another barrel .

 

[One Shot One Thrill]

How small are we talking at 100 when you say small? And if you were able to tweak it a bit at 100 to get smaller, would it be even smaller at 1000? Why do people say the smallest group at 100 may not necessarily be the best at 100

I will pay more attention to the 100 yard groups in the future. I have tuned at 100 gotten very, very small holes then went to 1k and no joy. Why it works in reverse I think the load is tuned better.
If you noticed one of the calibers not mentioned is .284
I have not had great success as of yet but I have only applied the CA 10 shot quick tune method with 1 bullet and powder combo it did produce a 4 shot group st 4.4" in one node and a 3 shot group with a 100 fps faster Av of 4.4 also. That was with no seating depth tweaking so it should tune smaller I hope.

 

[Stan Taylor]

Oh chit Eric quit taking his meds again LOL.
Seriously if he said he is doing it I do believe what he is saying he has one of the finest test facilities in the South a very nice range.

 

[Alex Wheeler]

I keep looking for a method that will work every time. I hope you found it!

 

[One Shot One Thrill]

I keep looking for a method that will work every time. I hope you found it!

Me to so far so good.

I'm now compiling the dope in hopes to build load charts for conditions. This will take another year or so. I hope then to be able to accurately forecast for most all conditions.

 

[Leo Smith]

Any chance you'd share your method?

Join Secret Creedmor Club.

 

[Knotwild]

I am not able to shoot $1000 yards, because I don't really have the money or equipment or knowledge to make it happen. But One Shot One Thrill has verified it with an offer - if it doesn't work, money back. If had the ability and equipment, I'd send the money and show up on his door step.