Short range tuning for 1000yd BR?

[johara1]

I was hoping to avoid this debate as it doesn't really relate to my topic.

I accept that people are doing it well and winning so that proves to me that it can be done and it works. Having also done it myself and seen the results I dont take any further convincing but thats not the point here.

The purpose of this thread is to discuss the ways we can tune at 100-300yds and still be competitive at 1000.

OK, I did what I just said I shot 5 groups in a row @100 yds. .056, .064, .120, .084, and .140. Went a 1000 match to test the first group out the gun ever was 4.6" 10 shot group . yes it works...... jim

 

[johara1]

BTW. the velocity stayed at 2977 till the fourth group and it went to 2982 and stayed through group 5. ES seem consistent at 2 to 7 ...... jim

 

[BartsBullets]

Ive never understood this Bart, the aspect of using velocity as an indicator.

There will be many times when my charge weight will need to change to maintain a velocity, different temperatures to a degree, different powder batches, different bullets, different primers, different stages of a barrels life and probably a good few more. My thinking (which I accept may well be wrong) is that the bullet doesn't know what speed it is doing, Ive tuned loads for good accuracy at different velocities with the same components.

I feel (and again I may be wrong) that powder charge is what affects barrel harmonics so if I tune to maintain a given speed then surely the harmonics will alter and that seems bad to me?

Accepting what you say though, how do I practically figure out what velocity my gun shoots best at and establish how big that window is?

What testing methods should i use?

This seems to me to be much harder than comparing powder charge and seating depth and/or tuner settings?



How small at 100 and 200 do you feel your own rifles need to shoot before you are happy that they will be competitive at 600 and 1000 BR?

Do you then check them further out than 200 or not during testing?



If I understood this velocity thing then I could easily check in in the window the days before a match assuming my match will be shot in similar weather conditions or does that really matter in the sense some powders will remain stable over a typical day temperature swing which for me would be around 10 degrees?



Are you being specific here to an Ezell as being the best or would any good tuner do?

I appreciate there are a lot of questions here but this is what happens when someone gives you something you dont understand, I would be grateful if you could spare the time to reply in more detail as I expect would many others

Curious

You can go to my web site Bartsbullets.com and get my phone number. I’ll be free this evening. If you want give me a call, I will explain to you what I’m doing. I’m in central time zone.


Bart

 

[Stan Taylor]

Curioi79us

You can go to my web site Bartsbullets.com and get my phone number. I’ll be free this evening. If you want give me a call, I will explain to you what I’m doing. I’m in central time zone.


Bart

Bart I am going to take stab at this one more time as you know my grammar isn't the best.Bart you and Ohara said it best on tuning at short range the velocities of your most accurate load is what you need to maintain an the lab radar we have now is an important asset if you're tune at home is good the majority of change at matches you go to is the velocities Windows the corrected altitudes changes that that's why tuning at home you need to stay on top of that to maintain your most accurate load an velocities to have that at your match is extremely important I do it a little different than you but not by much thanks for trying to help this guy out my phone is always available to him also.PS these two items are very beneficial to staying on top of your tune.

 

[johara1]

One other thing I forgot to mention is test the repeatable load in different temperatures, you need to know where the point is you need to change the load.... See you on the 7th Stan...jim

 

[Curious]

Curious

You can go to my web site Bartsbullets.com and get my phone number. I’ll be free this evening. If you want give me a call, I will explain to you what I’m doing. I’m in central time zone.


Bart

Many thanks for a very interesting and informative conversation this evening, it was good to hear your thoughts.

You are a gentleman Sir

 

[BartsBullets]

Many thanks for a very interesting and informative conversation this evening, it was good to hear your thoughts.

You are a gentleman Sir

Curious,

I very much enjoyed the conversation! Great talking with you! Call any time! Your friend!

Bart

 

[KenOath]

Curious,

Velocity is the key. Figure out what velocity your gun shoots at. Figure out how wide that window is. Tune your rifle to shoot as small as possible at 100. Check your loads at 200 for flyers. If you have flyers at 200 tweak seating depth until gone.

Go to your 1000 yard match and make sure you are in your velocity window. If you are you’re good to go, if not adjust your load to get inside your velocity window.


Get an Ezell tuner and .25 moa isn’t small enough.


Bart

When your tuning at 100 and 200 are you shooting 5 shot groups?

 

[BartsBullets]

When your tuning at 100 and 200 are you shooting 5 shot groups?

Three shots while tuning. Then 5 shot groups to confirm!
Bart

 

[joshb]

Bump.