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25-06/100g NBT's/Retumbo/400 yards

 
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  #1  
Old 03-02-2009, 02:00 PM
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Location: Hermiston, Oregon
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25-06/100g NBT's/Retumbo/400 yards

Got out yesterday and shot a few loads at 400 yards. Wind was maybe a couple MPH from the left. Temp of 40 degrees. Shot from a bench. 3 shot groups at 400 yards. Loads were 100g NBT's, 60g, 60.5g, 61g of Retumbo, Winchester case and Winchester WLR primer. Think I will stick with 61g for 3540fps and 1 3/4" at 400 yards. Will be an awesome LR coyote and will still do the job for deer.

All 3 loads were fired with no scope changes. Went up 4.1 MOA from a 100 yards zero, 3500fps. Wind was blowing from the left a couple MPH. The loads are marked with a circle for 60g, vertical line for 60.5g, and a horizontal line for 61g.

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Old 03-02-2009, 02:35 PM
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Re: 25-06/100g NBT's/Retumbo/400 yards

Is this just a 24" barrel?

Your velocities seem to be unusually high given that your load of 60.5 is the max listed load by hodgdon for a 117 grain bullet and they are only getting about 3000fps.

It looks interesting for me to try it with mine. I have a 26" barrel. I was thinking of switching to 100 grain smk's and reloder 22, but if your numbers are for real, I am definately going to look at retumbo.
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Old 03-02-2009, 03:09 PM
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Re: 25-06/100g NBT's/Retumbo/400 yards

Yes, 24" light varmint shilen.

Dont know what it is with this rifle, but it shoots Retumbo really fast and quite accurate. Actually shoots fast with every powder/bullet combo tried, but inparticular Retumbo. Not to sure what it is with the rifle/chamber, but it seems to produce velocities that are anywhere from 100-200fps over book, while using 3-4g LESS powder.

58.5g Retumbo behind a 115g VLD gives me 3275fps out of the same rifle.

Retumbo might be worth a try. My dads going to give it a shot in his Ruger with 100g NBT's soon as well.

Heck I"m gaining a good 200fps over other powders with same bullet weights. Right on the heels of a 257 WM as a matter of fact.

I'm not complaining...
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Old 03-02-2009, 03:39 PM
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Re: 25-06/100g NBT's/Retumbo/400 yards

What made you try retumbo? I would have thought it was too slow. Have you tried Reloder 25? What has been your results with any other really slow powders in the 2506?

I would be happy with those velocities out of mine with 85 grain bullets.
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Old 03-02-2009, 03:44 PM
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Re: 25-06/100g NBT's/Retumbo/400 yards

I think I'd shoot a five shot string with the 60.5 and 61 to see if the 60.5 had the better vertical again. I think I'd give up some speed for less vertical. Nice shooting.
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Old 03-02-2009, 11:34 PM
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Re: 25-06/100g NBT's/Retumbo/400 yards

I agree, definitely take a harder look at 60.5 gr load. That group had about 30% less vertical than your 61 gr load. I'm sure alot of the horizontal is mostly due to wind reading. Just my .02 cents.
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Old 03-03-2009, 01:43 AM
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Re: 25-06/100g NBT's/Retumbo/400 yards

Quote:
Originally Posted by BigHink66 View Post
What made you try retumbo? I would have thought it was too slow. Have you tried Reloder 25? What has been your results with any other really slow powders in the 2506?

I would be happy with those velocities out of mine with 85 grain bullets.
I am using RE25 in my 24" barreled 25-06, velocities are almost exactly the same with Retumbo, but RE25 was more accurate in my rifle.
Velocities are: 100gr NBT's 3577fps, 110gr NAB's 3344fps and 115gr NP's 3268fps.
All loads have been chrono'd and pressure tested, neither RE25 or Retumbo work well with bullets lighter than 100gr, but RE22 will give you more than 3600fps with 85gr NBT's.
If you would like load data, PM me, and I will give you the details.

BigHink66,
Very nice shooting there, brother!
I have many buddies that don't believe their own eyes when I get my 25-06 out on my own 900yrd range, it makes their 243's look like scatter guns.
I normally shoot at 600yds, and have shot groups in the .2MoA, no wind, while my buddies 243's were lucky to get 3MoA at 300yds.
It's just a wonderful cartridge, the 25-06.
Cheers.
MagnumManiac.
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