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I built myself a 308 a few weeks back and yesterday got around to shooting it. I used Ramshot Big Game, 168 Sierra MK, Federal brass. I used WLRM primers. I always get better results with magnum primers when using ball powder. Here is what the chrono says.
Charlie
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The data and opinions contained in these posts are the results of experiences with my equipment. NO CONCLUSIONS SHOULD BE DRAWN FROM ANY DATA PRESENTED, DO NOT, UNDER ANY CIRCUMSTANCES, ATTEMPT TO REPLICATE THESE RESULTSj
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Good report, thanks! What's your barrel length on this 308?

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66 centimeters.
Charlie


The data and opinions contained in these posts are the results of experiences with my equipment. NO CONCLUSIONS SHOULD BE DRAWN FROM ANY DATA PRESENTED, DO NOT, UNDER ANY CIRCUMSTANCES, ATTEMPT TO REPLICATE THESE RESULTSj
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How many shots per string?

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I would defer to your knowledge and experience in all things rifle related...but smarter people than me (there are many) have often remarked that ballistic uniformity does not always translate to accuracy. What say you?


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Share your load, pls?


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Charlie and I have talked about this some, and another reason I like Big Game is that it has proven to be the most temperature-resistant of the Belgian-produced Ramshot rifle powders in my testing. In fact, in those tests it has ranked up there with other powders advertised as temp-resistant, in a wide variety of cartridges.

I keep a running list of the handloads used in my rifles and Eileen's, and more of our loads use Big Game than any other single powder. This is also because the burn-rate (slightly faster than H4350/IMR4350) is suited to so many cartridges.


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Charlie, if you were to take the time and effort to make sure of such things as case tumbling, flash-hole reaming and primer pocket cleaning, the amount of humidity in your loading area, the phase of the moon, and a few things of that nature you could get that variation in speed down to something acceptable. wink


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I've pretty much settled on Big Game in my 30-06 with 165 Nosler PT. Good velocity and accuracy.

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Jordan
10 shot strings.
Charlie


The data and opinions contained in these posts are the results of experiences with my equipment. NO CONCLUSIONS SHOULD BE DRAWN FROM ANY DATA PRESENTED, DO NOT, UNDER ANY CIRCUMSTANCES, ATTEMPT TO REPLICATE THESE RESULTSj
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Chronograph numbers and accuracy don't always go hand in hand. I have witnessed several loads with 60 fps swings that grouped really well. And some like the loads shown here that didn't group well. but.....aint there always a but...if I get a load with a really low deviation, I have always been able to play with seating depth to make it shoot well. A few times, just for testing, I have lengthened the throat and it worked. Put no faith that a low SD means absolute accuracy, and put no faith that it wont.
Charlie


The data and opinions contained in these posts are the results of experiences with my equipment. NO CONCLUSIONS SHOULD BE DRAWN FROM ANY DATA PRESENTED, DO NOT, UNDER ANY CIRCUMSTANCES, ATTEMPT TO REPLICATE THESE RESULTSj
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Originally Posted by Charlie_Sisk
Jordan
10 shot strings.
Charlie

That’s impressive.

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Certainly prepping brass is important. Sorting sometimes helps a lot, sometimes not. I have learned that annealing is sometimes more important than all others combined. Sometimes not. But nowadays, if something isnt working, I anneal. I pay particular attention when seating bullets. If one feels too easy or too hard, put it aside. Bullets seated straight in the case does wonders. And a good barrel never hurts.
Charlie


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Ballistic uniformity certain lessons vertical dispersion at long range



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I use a little Big Game every now and then.


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The last rifle I brought home was a 308. In
the past, I used a lot of Varget. In times to come I may look to Big Game. This one dotes on Federal Gold Metal Match. I realize I have much to learn, but the 308 envelope leaves a margin for error.


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Originally Posted by Just a Hunter
I've pretty much settled on Big Game in my 30-06 with 165 Nosler PT. Good velocity and accuracy.


My cousin and his son use the same projectile from a 30-06 but we used Ramshot Hunter/WLR/Fed brass instead. Right @ 3K FPS and excellent accuracy from a Tikka T-3 and a SC M70 Supergrade.

Last edited by horse1; 04/20/21.

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I use Hunter in my 06 with 180 grain bullets. Works really well.


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Originally Posted by Charlie_Sisk
flintlocke
Chronograph numbers and accuracy don't always go hand in hand. I have witnessed several loads with 60 fps swings that grouped really well. And some like the loads shown here that didn't group well.

Put no faith that a low SD means absolute accuracy, and put no faith that it wont.
Charlie


I appreciate your verification of what I've recorded. I began chronographing in 1981 with an O 33 and I still use it. Somewhere about 2013 or 2014 I updated the skyscreens with the III s.

I have at least 5 (five) notebooks of graphing & groups of a large number of rifles - in many cartridges & calibers.

I DO like a low SD but it is NOT a reliable indicator of accuracy.

Thank You

Jerry


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I use Big Game in my 7mm08 to push 140 Accubonds. Best powder I’ve found for that rifle. I just wish I could find more of it as I’m about out...

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