Case Weight and Accuracy???
Hello all. I just purchased a Kimber 8400 in 300 Win Mag and then bought 2 boxes of new Nosler Brass. I checked the Lot Number to insure they were the same lot but then weighed them anyhow before dropping them in the MTM box I purchased at the same time.
With my 338 Win Mag I purchased one box of Nosler brass that was all the same weight (+/- .3 grains) and reduced my 100 yard group by a 1/2 inch.
these 2 boxes weigh in at
Box 1 = 214 gr +/- .3 gr
Box 2 = 215 gr +/- .3 gr
all the cases are the same length +/- .005 so that is not the extra gr I am seeing
How much will this affect my accuracy?
This is will be my primary hunting weapon so in realty all I need in minute of deer or moose but there is something to be said for the confidace of knowing you are carrying a sub half MOA rifle when you spot that critter at 400 yards.
Case Weight and Accuracy???
[QUOTE=JoeB;3531]IME, careful case prep has much more effect on accuracy than case weights. I don't weigh them at all
I haven’t weighed a piece of brass in over 10 years. Like I said in my earlier post, case volume can be affected by case weight. I have a lot of rifles that are .5 moa or sub .5 moa, that I have no idea how much the brass for those rifles weigh. When I shot bench rest matches in the 90’s, each brass was weighed, primer pockets uniformed, flash holes deburred, necks turned, you name it, but that’s a game where .001” can make or break you. For the average shooter and varmint hunter, brass weight primer pockets and flash holes will make no noticeable difference, but to say that it makes no difference would be wrong. One grain difference in weight on a voluminous case, such as the 300 win mag, is not a huge difference, but it’s still a difference. The OP said that weight sorting his brass on another rifle helped his groups shrink, so why not try on this one?
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