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Posted: 6/16/2010 9:53:07 AM EDT
| What is a good weight span to sort brass by? Between 1 grain? Between 1/2 grain? The whole batch is within 4 grains. I borrowed a digital scale so it is pretty easy to sort the brass. |
| As a scientist, but not a re-loader, - the closer the two objects are to identical, the more likely they will behave similarly. However, at some point you get diminishing returns and then you enter the realm of "cultural vodoo" (it's always done this way or i always do it this way even if doing so provides no tangible benefit). I think you would get the best results by discarding the heaviest and lightest. I've read about people measuring to the tenth of a grain, which seams a bit extreme to me. The other school of thought is to measure the volume of the case with water. |
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If you are actually engaged in 600 or 1000 yard tournaments weighing brass is a waste of time.
I've seen people seperate an entire case and sort it all by weights. This should be done after each case is trimmed to a uniform length. .5 grain is pretty anal but that's what I would do (if I were doing it). Actually you could sell any outlyers (the really light or really heavy) as new brass and retain the bulk of the lot that fell somewhere in the middle. A two grain span from high to low is very very good. Most long range competitors will choose a very high grade brass like Lapua, trust the manufacturer and shoot it. Others will do the sorting by weight, but many records are held in F-Class by people shooting Lapua brass without sorting or weighing it. F-Class is one of the toughest divisions out there right now, so think about that. Ammo is very forigiving unless really wide variations exist, particularily in neck thickness concentricity. Provided you aren't mixing a bunch of different brands that are all of dubious heritage, most rifles won't know the difference. Bullet and barrel quality are far more important to small groups than identical weight brass. |
| It is a 24 inch bull barrell, for a ground hog setup. I want to see what it will do. I found 18 that were exactly the same weight (to the tenths grain). I hand weighed the powder. Will try them soon. I have lucked into 2 groups that were under .5, probably all groups I have fired average 2 inches. I still have rest and bag and shooter issues to work through. |
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