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Stats To Determine Strengths and Weakness’s 600yd Benchrest

I wonder if one of the reasons there is a difference of opinion here is because Bart and Alex are mostly talking about experience from different yardages (600 vs 1000). I know only a fraction of those who have commented but my couple years of LR shooting has revealed (to me) that cracking the code to the 1000 yard game is all together different and more difficult.
 
At piedmont Mirage plays a big role after lunch ... Poa is a guess to a moving green blue blob.
Right end stays in the shade longer than left end. bench draw(?) matters.
Also most the time wind is r to L unless a front is coming/leaving.
Each month hg/lg reverse.

All this is part of the game ...
 
Bart, I never said its not working for you! I tune everything from the little 6s to the big 338s and I shoot them all at 1k. All Im saying is I have seen the velocity to tune windows change. Its actually much more obvious on the larger cases. I'll give an example of the last rifle I tuned. At 1k this rifles upper end was about 2990. Anything above that went straight vertical. I had to keep the velocity under that number and adjusted powder to do it. For one reason or another, that barrel started to shoot around 3030fps. I backed off to under 2990 and the gun went out of tune. Back up to 3030 and its happy. Why, I dont know, surprising to me? No, have seen lots velocity changes, some effected accuracy, some didnt. So far as tuning, I cant even make a 600 yd tune work at 1k every time. I am that dense I have to do it at 1k.
 
3 shot groups. Worked on the tune quite a bit with this one so I saw the same groups multiple days out. Multiple weeks out. You absolutely could not take it to 3000 without a paint stripe. Guys out here have tested their lab radars vs each other to see if they were lying because lots of us see this type of thing.
 
JasonPeterson said:
I wonder if one of the reasons there is a difference of opinion here is because Bart and Alex are mostly talking about experience from different yardages (600 vs 1000). I know only a fraction of those who have commented but my couple years of LR shooting has revealed (to me) that cracking the code to the 1000 yard game is all together different and more difficult.
Click to expand...

Jason,

I've not found shooting a 1000 yards any more difficult then 600. Granted I don't shoot 1000 yards a lot but when I have, my gun has been competitive. My experience is ”if it's tuned properly at 100 it will shoot at 600. If it shoots well at both 100 & 600 then it will also shoot at 1000.
 
Alex Wheeler said:
3 shot groups. Worked on the tune quite a bit with this one so I saw the same groups multiple days out. Multiple weeks out. You absolutely could not take it to 3000 without a paint stripe. Guys out here have tested their lab radars vs each other to see if they were lying because lots of us see this type of thing.
Click to expand...

Something is getting lost in the translation. I've seen barrels speed up but as long as you adjusted the powder back to your original velocity it would shoot. The other thing is the tune going away because the barrel needed a seating depth tweak.
0C2740AA-CA36-46E2-ABDF-F78849C4864E.jpeg
For example this barrel shoots between 2900 and 2930. It's always shot like a laser. Came out and it wouldn't shoot. The bottom row is me going up and down on powder. Can't get the gun to shoot. Changed the seating depth .003 and it started shooting again (top row) at it's normal velocity.
 
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Ok, I see some of the discrepancy. Your looking at a pretty wide velocity window. If thats your window, then yes I will agree that your gun should shoot in there. I assumed you were looking to be very close to an exact speed.
 
After running around with Gaylon and Sophie the later part of this year, I’ve learned to load at the range, or the same conditions you will be shooting in. Also finding the max and minimum velocity’s for your barrel, is what Bart has showed me. No need to over complicate it.
It works, plain and simple.

After going “preloaded” in 2018, and luck out in placing at all.. being told to do it is one thing and after being shown how to apply it , to see it on paper is another. I will continue to follow Bart’s & Gaylon’s theory on future matches. I test here at 300yds
 
This has been a VERY informative discussion! I hope it isn't over. When you have competitors like Sam and Bart along with Smith's like Alex disagreeing and sorting it out in an civil manner everybody can learn. When you have the combined knowledge of people like this discussing the techniques for accuracy you ought to sit up and pay attention, I know I am! Thank you guys,
John
 
BartsBullets said:
Something is getting lost in the translation. I've seen barrels speed up but as long as you adjusted the powder back to your original velocity it would shoot. The other thing is the tune going away because the barrel needed a seating depth tweak.
View attachment 1144917
For example this barrel shoots between 2900 and 2930. It's always shot like a laser. Came out and it wouldn't shoot. The bottom row is me going up and down on powder. Can't get the gun to shoot. Changed the seating depth .003 and it started shooting again (top row) at it's normal velocity.
Click to expand...

Bart,

My understanding of what you wrote, You indicated that you went up and down on powder with no result. Gun still did not shoot.

You changed seating depth and that was the solution. Your post indicated that you needed to stay in the velocity window of the bbl. How is it that powder charge changes missed the window but seating depth did?

Just trying to understand how the two different changes affect the "Window".

Bob
 
Bob3700 said:
Bart,

My understanding of what you wrote, You indicated that you went up and down on powder with no result. Gun still did not shoot.

You changed seating depth and that was the solution. Your post indicated that you needed to stay in the velocity window of the bbl. How is it that powder charge changes missed the window but seating depth did?

Just trying to understand how the two different changes affect the "Window".

Bob
Click to expand...

Bob,

To have a proper tune its both seating depth and velocity. Some barrels you need to chase the lands others you don’t. When the gun wouldn’t shoot inside it’s window I knew I had to adjust seating depth.

Bart
 
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