paul money
2 posts
Nov 02, 2004
6:57 PM
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Has anyone tryed the 115 sierra's in the dasher or any of the improved br case and what kind of speed did you get
thanks
paul
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flatlander
20 posts
Nov 08, 2004
2:18 PM
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Paul - One of my friends has just started load development in his new Quadlite/Krieger 28" 8-twist chambered for the 6BR Imp. Ubl (near identical to the Dasher, but with a .274" neck). It looks like his barrel is going to give around 2950fps with N550 & moly'd Tubb 115s with reasonable pressure.
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mikecr
26 posts
Nov 08, 2004
5:34 PM
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QuickLoad shows 62Kpsi.
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lynn
Charter Member
31 posts
Nov 10, 2004
8:18 PM
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Mikecr
My load in a standard 6BR is 31.5 gr of Varget at 2970 fps using naked 107 Sierras in a 30 inch tube.
Can you run your program to see if i can get 2850 fps running similar pressure with the 115's?
Will it run 2950-3000 fps if it runs similar pressure in a 6 Dasher?
I am wanting to assemble a gun capable of 3000 fps with a very long neck and 6BR efficiency to shoot the new 115's.I don't want to burn more than 34-36 grains of powder if possible and would like to keep a 30 inch maximum on the barrel if possible.
Lynn
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dmoran
Charter Member
44 posts
Nov 11, 2004
5:24 PM
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I have not yet tried the 115's in my Dasher. I will some day
but don't have any bullets yet.
I get 3000 to 3125 fps from 105's and 107's with the use of Varget; N-140; & RL-15 from 1500'-elevation/54-degrees.
I would estimate 2950 to 2975 would be the velocities seen from my Dasher(28" Shilen/8-twist) with the 115's.
Hope this helps....Happy Shooting
Donovan
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lynn
Charter Member
37 posts
Nov 12, 2004
2:09 AM
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Donovan
If i sent you some 115's would you be willing to run 5 shots down your tube to get a chrony reading? Also what is the neck length on your Dasher?
Lynn
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mikecr
27 posts
Nov 12, 2004
3:20 PM
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Lynn
I have to say that I've given up on a calibrated Varget powder file. Too many contradictive loads posted.
But adjusting best as I can for your load/results, I'll give it a whirl.
For a std BR case, formed brass, 42grH2o, your barrel, 115gr Sierra, bullet shank seated .3", lightly into the lands, I get a matched pressure(60.5Kpsi)load as follows:
32.4gr(91.6% fill) N550 giving 2845fps
For a Dasher/115 combo, your barrel, same seating, 44grH20 + 5% efficiency, matched pressure:
37gr(99% fill) N560 giving 2920fps
Another is 33.4gr(94.6% fill) IMR4350 giving 2900fps
I haven't run external ballistic curves on this, but there aren't alot of options for the 115gr from this case. Any real gains seem beyond it's capacity.
There is a similar combo(by scale) which also hits such a barrier. The 140smk/6.5wssm. It just cannot quite touch the big boys, given it's capacity and setting reasonable pressure limits. Nothing wrong with that. Afterall, we're reaching for a pretty high bar.
Maybe someone could post they're combination and results. The more info, the better.
Last Edited by mikecr on Nov 12, 2004 3:35 PM
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dmoran
Charter Member
45 posts
Nov 16, 2004
9:25 PM
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lynn,
Sorry for the delayed response. Busy hunting. Hardly home long enoth to even sleep...hehe
Yes, I would do those tests.
I will Reply Email you my address & phone.
Get me at [ dmoran AT scicable.net ]
I predict I will see the fallowing velcities:
Varget = 2930 to 2950f/s
N-140 = 2950 to 2975f/s
RL-15 = +2975f/s
Happy Shooting
Donovan
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KREBAUM
1 post
Nov 18, 2004
1:33 PM
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Paul- I have been shooting the mollied 115s out of a 6br improved with Viht 550 at 2950fps with very good results at 600yds. I have a 28" Krieger 1x8 twist barrel. This load does not seem to show excessive pressure, there are no signs of ejector marks, the load does not crater primers, no sticky bolt lift. I have also tried Varget and rl-15 but both powders seemed to be a little too fast for the 115s. I would start to see excessive pressure signs when the velocity would reach over 2850fps with Varget.
Hope this helps,
Greg Krebaum
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