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post #1 of 14 (permalink) Old 11-07-2010, 10:17 AM Thread Starter
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Accuracy and changing powders?

Hi Guys,
I changed powders from Varget to Reloder 15 in my Winchester model 70 in 308. I am able to work up to max loads listed in the Nosler manual with no pressure signs.Bullets are 165 grain Nosler Accubonds.The reason I tried switching powders is because I was having a few issues with the compressed powder charge using Varget.Anyway,I figured accuracy would be similar, rifle is very accurate with Varget, not nearly so with R15.Rifle will shoot sub MOA with Varget and best load with 43 grains of R15 went three shots into 1 1/4", all others were worse.Everything else is the same but the powder. What gives ??? Thanks!
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post #2 of 14 (permalink) Old 11-07-2010, 10:23 AM
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Re: Accuracy and changing powders?

could be the burn rate...R15 i think does better in bigger cases...i know my 35 whelen really likes it...

varget tends to do really well in 308 sized cases...


someone else will surely know more than i...but, some powders just dont work great in some calibers...for every caliber there seems to be a favorite powder or 2...

looking at the books, one could buy a can of varget and load dang near most hunting cartridges..but, its not always best..

i rather own 10 cans of powder for 10 calibers and have them shoot accurately opposed to 1 i can use in all of them that doesnt shoot so well..
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post #3 of 14 (permalink) Old 11-07-2010, 10:24 AM
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Re: Accuracy and changing powders?

Every rifle is a law unto itself...

I'd stay with Varget...Not sure what kind of issues you were having with a compressed charge?

1.25" ain't all that bad....
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post #4 of 14 (permalink) Old 11-07-2010, 10:35 AM
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Re: Accuracy and changing powders?

Quote:
Originally Posted by wiktor
Hi Guys,
I changed powders from Varget to Reloder 15 in my Winchester model 70 in 308. I am able to work up to max loads listed in the Nosler manual with no pressure signs.Bullets are 165 grain Nosler Accubonds.The reason I tried switching powders is because I was having a few issues with the compressed powder charge using Varget.Anyway,I figured accuracy would be similar, rifle is very accurate with Varget, not nearly so with R15.Rifle will shoot sub MOA with Varget and best load with 43 grains of R15 went three shots into 1 1/4", all others were worse.Everything else is the same but the powder. What gives ??? Thanks!
It doesn't like Reloader 15. Odds are if you chronographed the loads the velocity would be different than Varget, or at least the ES & SD.

IME A given bullet likes to come out the barrel at a certain velocity (or two) and unless you can match that velocity with more than one powder they won't shoot the same.

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post #5 of 14 (permalink) Old 11-07-2010, 11:52 AM
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Re: Accuracy and changing powders?

Some rifles are picky, some aren't. My mod SIX 243 will shoot darn near any 100 gr bullet to same point of aim at 100 yards with the same accuracy.

My 270 in 760 will shoot 130 gr corlokts to about an inch. Anything else is all over the place. Try using 4831 in it, and you will be hitting the targets on either side of where you are aiming. I just learned to buy remington factory loads.

If I were you I would go back to what worked.

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post #6 of 14 (permalink) Old 11-07-2010, 12:07 PM
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Re: Accuracy and changing powders?

Varget and Re15 are pretty far apart on the burn rate chart. Not sure what problems you had with the compressed charge. The book says at a Varget max of 46 gr it is at 103%, but others are listed up to 114%, 103% "shouldn't" be an issue. What about bullet seating depth, can you seat the bullet a little farther out so you don't compress so much. Neck only sizing will free up a little extra volume capacity. A longer drop tube will significantly reduce powder volume.

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post #7 of 14 (permalink) Old 11-07-2010, 03:58 PM
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Re: Accuracy and changing powders?

I just loaded some 7mm/08's with 4895, could not hold 1 1/2 inches with Varget. At this time I only have Hornady 139 BT's so hope the powder switch helps.

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post #8 of 14 (permalink) Old 11-07-2010, 07:18 PM Thread Starter
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Re: Accuracy and changing powders?

Thanks for the reply's! I'll have to give Varget another try.The problem I was having with the compressed charge is that as I approached 44.5-46 grains the bullet would not seat at the same depth as lighter charges and my COAL is 2.838" so the bullet was out a little further.My loads all shot very well fromm 44-45.5 grains,at 46 the groups opened up. I just ordered a Forster drop tube so I'll try again.Any other suggestions on compressing the powder a little?
Thanks!
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post #9 of 14 (permalink) Old 11-14-2010, 12:09 PM
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Re: Accuracy and changing powders?

my 308 hits its accuracy node between 43.0 and 43.5 of rl-15 and 165gr. accubond or bal. tips. that charge is a slightly compressed load with lapua cases. powder charge % depends on the case capacity. a rem case will hold more than a lapua case.

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post #10 of 14 (permalink) Old 11-14-2010, 12:21 PM
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Re: Accuracy and changing powders?

Using the drop tube, let the powder swirl around the top of the funnel, trickling it slowly into the case....Lightly tapping the case as the powder drops will help it settle into the case....
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