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Load advice .308 win

 
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  #8  
Old 12-15-2011, 10:27 AM
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Re: Load advice .308 win

If you haven't gotten pressure signs yet, go ahead and up the load. You may find another accuracy node. Good shooting. How many shots are in the middle target with one hole?

Tank
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  #9  
Old 12-15-2011, 02:26 PM
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Re: Load advice .308 win

Just the one I was having a bit trouble at first actually getting on target, then realised in my excitement I had managed to wind the scope up 2 MOA instead of down... hmmmmm.

Yes I was thinking that today, keep pushing the load up. I really need good velocity and was hoping for 2600 min. Maybe start at 44.3 and go up 0.2gns at a time? Max is listed at 45gn and is a compressed load.
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  #10  
Old 12-15-2011, 03:21 PM
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Re: Load advice .308 win

Quote:
Originally Posted by earplay View Post
Just the one I was having a bit trouble at first actually getting on target, then realised in my excitement I had managed to wind the scope up 2 MOA instead of down... hmmmmm.

Yes I was thinking that today, keep pushing the load up. I really need good velocity and was hoping for 2600 min. Maybe start at 44.3 and go up 0.2gns at a time? Max is listed at 45gn and is a compressed load.
I know you want to stick with Varget, but maybe try some RL15. It has a tendency to shoot a little faster than Varget. RL15 burns a bit slower. Also I would start where you left off at 43.8 and continue working up in .2grn increments. I would suggest setting your bullets .010-.015" off the lands.

Tank
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Matthew 7:13-14
"Enter through the narrow gate. For wide is the gate and broad is the road that leads to destruction, and many enter through it. [14] But small is the gate and narrow the road that leads to life, and only a few find it.

If you find your self in a fair fight, your tactics suck!- Marine 1st Sergeant Jim Ryfinger

Friends don't let friends develop canonitis!-chucknbach

arguing over the internet is like the special Olympics....even if you win, you are still...special!
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  #11  
Old 12-15-2011, 04:24 PM
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Re: Load advice .308 win

I am keen to stick with Varget primarily because I only reload for my 30-30 and now .308, and have a good load for 30-30 set up all ready. If I end up having to sacrifice some velocity then I can live with that.

I didn't post a picture of the other target, but my max load was 44.2gn hence suggesting picking up at 44.3gn. There was quite a marked shift to the right with that final group.

I was shooting factory Win ammo to break in barrel and average group size was 1-2 inches. It blows my mind the difference some reloads make!

Matt
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  #12  
Old 12-15-2011, 04:41 PM
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Re: Load advice .308 win

A couple of things to consider.

Down in the Reloading section is a long thread on weight sorting brass, especially Winchester. Do it, as it hurts nothing at all. Win brass has about 1 grain more case capacity than several others so you can get a little more velocity out of it.

Varget is a good powder as is RL17 and 4064.

The Berger 155.5 is a good bullet capable of killing antelope and eastern whitetails but I would not make it the bullet of choice for larger or tougher animals. The Berger 175 OTM is an accurate bullet and works very well on animals. It will allow you to play at longer ranges.

No matter what you do you should play with seating depth here pretty shortly and see if it will tighten up groups. Remember if you jam a bullet it causes pressure to increase so don't jam your bullets without reducing from max and working up. Perhaps a half a grain reduction from max would be enough to compensate.
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  #13  
Old 12-15-2011, 05:30 PM
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Re: Load advice .308 win

Ok thanks for the input. I will tweak seating depth once I am happy with the current charge. I am keen to stick with the 178gn Amax now that I have a supply, and they seem to work well.

According to OCW Overview - Dan Newberry's OCW Load Development System

45gn seems to be an ideal charge for my setup, but this is a max load. Is it risky having a max load as your standard load?
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  #14  
Old 12-15-2011, 07:14 PM
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Re: Load advice .308 win

Quote:
Is it risky having a max load as your standard load?
Varget will change with temperature and lot #. Loads that are max at 30-40 degrees will be causing sticky bolt in the summer. New lot# may be faster or slower and create issues with group size and pressure. Best advice is when you get a load that is really tight then buy 8#s of that lot.
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