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What is optimum barrel length for 100-200 yards competition

marchx said:
I am going to use the rifle also for 300m competition with bipod. My bullet of choice will be 95gr vld- I just have 3boxes of those. I did some modelling and I can push them at about 2800fps with N140.
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I'm running 95 grn FB in my 22.5" HV taper barrel 1-10" twist, with a standard 6BR @ 2935 with an average ES with 5 shot groups in the low teens 10-13 fps varget is your friend. You'll need 10 twist or faster. Not sure I could stabilize a BT with 1-10, since it will be a longer bullet, and I'm right on the edge.

My 26" 6BR gets 3005 fps av. With single digit ES, but it's a 1-8 twist, and use BT . I'm running the same powder most run in a Dasher using 105 to 108 grain bullets. My brass life is great.
 
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foxguy said:
What BT bullet are you using in your 26" 6MM BR ,1-8" tw barrel . 95GR BT ??

Thanks,
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Bibb bullet, I mistakenly stated same charges others use in the Dasher. My mistake and I fixed it in my post above, I meant to state the powder, most use in the Dasher. Varget. But H4350 is very good as well with 95 grn. The Bib uses a shorter BT profile, with has the same or better BC as other VLD's, nearly identical to the 105 to 108's.
1000001044.jpg
 
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Bill Norris said:
Experimenting with PPC cartridges load development in an enclosed environment.
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See if you can find the whole article, it was published in Precision Shooting Magazine in 1993.
There is a site where you can see a reprint but it escapes me at the moment.
I printed out the whole article, runs to 9 pages.
Yes, 22PPC & 6PPC for the most part though even a .25/06 and .30 cal were tested.
The 22 came out on top followed by the 6mm.
In the article there is a quote saying:

Building a load is important, Virgil conceded, but "tuning"cases is what stands between you and that final fraction of an inch that separates a good gun from a barn burner. "Tuning" cases goes far beyond sorting, neck turning and prepping the primer pockets and flash holes.

The reference to barrel length is here, bear in mind that this was in the era before barrel tuners and still to this day applies to nearly everyone shooting 6PPC bench rest guns... Short, heavy "truck axle" barrels.

But no bit of information was, Virgil believes, more valuable than a little advice Jim Gilmore passed along. Jim said a barrel MUST be 21 3/4" long for optimum accuracy. That precise length, he stated, sets up a vibration pattern that duplicates well from shot to shot.

I use a 6BR at all distances from 100 to 600 and though it won't quite match the 6PPC at 100, I occasionally will manage that elusive "one hole" non clover leaf group and have managed a 200.14 at 600 off the mound.
28" Benchmark heavy varmint 1:8 twist, 29.3gr Varget{AR2208}, CCI 450's, 103's 5 thou jam, .0015 neck tension,
Peterson brass, Bukys style tuner by Perrott Precision Machining, made in OZstralia but available from Bruno's in Phoenix.
 
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Back in Jr High School, my Math teacher, taught me to "Round Off" to, WHOLE Numbers, so I went from, a measly, 21 3/4" Barrel to, a full, 24 inches for, a little, EXTRA, Speed, in my 6 XC, just, B'cause,.. I could !
And StaBall 65, really LIKES that, extra couple of, inches
 
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Lengths of short range benchrest barrels are strongly influenced by the weight limits of two of the classes, which is 10.5#. If your scope is lighter, and your stock you can spend a little more of your weight limit on the barrel, if you want, but the need for rifle balance is also an issue.
 
6BRA said:
https://www.angelfire.com/ma3/max357/houston.html
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That link has the whole article but is not the one that I downloaded that has pictures of the "Warehouse" & a .025" group.
My download was an exact reprint of the original article as printed in Precision Shooting Magazine "Special Issue No. 1" in 1993. It's out there somewhere... If I can track it down I will put it up here.
Found It!!
You can download it or just click the "print" button once you are on this site:

www.scribd.com

Secrets of The Houston Warehouse by Dave Scott Precision Shooting Magazine Special Edition 1 1993 | PDF | Rifle | Cartridge (Firearms)

Long range shooting in perfect conditions - a new realm
www.scribd.com www.scribd.com
 
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Powder choices with 100 percent burn inside the bbl will be limited at shorter lengths. This means you will need faster burning powders, if you care about this sort of thing. Alot of slower burning powders can reach 100 percent burn in longer bbls.
 
JoeDuke said:
The Houston Warehouse article barrel length of 21.75" being "ideal" or "only possible length" or "something magical" is a prime case of an urban legend that just wont die. Proper barrel length is the one that you can make weight and good balance on your particular rifle setup.
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It's not an urban legend, King was using a 21 3/4 and that was the ideal barrel length for his testing under his shooting conditions!
 
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