Weighing cases

J

John Kearns

Guest
I have just prepped some new 22-250 brass. I am wondering how much the case weight would have to vary before accuracy would be affected? The average case weight in this case is approx 188 grains.

Many thanks,
John
 
case weight !

I personally limit my weight range to + to - 2 gr. in all rifles I expect to get a reasonable degree of accuracy from, with the cost of componets rising I'd be inclined to opening up that "window " just a bit.
 
Sorta on your own with this

Some would weigh cases religiously regardless of any actual or perceived benefit. Sounds good - do it.

Some continue to weigh cases based on one or more actual/perceived occurrences.

Some did and now don't because of one or more actual/perceived occurrences.

Some never did, still don't, and subsequently, have no basis for change.

Some haven't, but will, and become one of the above - excepting the never did/still don't subset.

Myself and Sarah Brady do not weigh cases. The probability of either of us weighing cases to affect accuracy is very small but for sure I would be the longshot.
 
weighing cases

Thank you for the information. Im pretty close to that. I found a couple in the batch that were quite a bit lighter. It turned out that the trimmer had cut them short. Since the trimmer indexed off the inside of the base I must assume the base was thinner than normal.
 
Take some of the lightest and some of the heaviest cases and load them with your best load and shoot them . If you can see the difference than sort them. The question I have is, where is the weight missing from, the volume or the length or the base.
I used to weigh but Wilbur twisted my arm and made me say uncle:D
 
If I were going to sort brass it would be by internal volume and not weight. As previously stated where is the weight located??

Mike Swartz
 
weighing cases

I had 4 bags of current new Winchester brass and about 160 rounds of older but still new Winchester brass. After discarding the malformed cases I prepped them and weighed them just to see if there was much variation. In all honesty there isnt. The older brass averaged about a grain less. The new brass all weighed within 5 grains with 86 % of the brass all within a grain and a half of the average. My shooing will never know the difference I suspect but I will keep a record of it just for my own satisfaction.:)
 
FBecigneul said:
The ones that are the closest in weight are also closest in inside dimensions, since all the outside dimensions are the same.
Click to expand...
Can you be sure of that? In a fit of boredom, I once measured & eyeballed cases at the high end & low end of a batch I weighed & could see or measure differences in the extractor cutout on some. Weight differences there are going to mean diddly to internal dimensions.

On the other hand, I would fondly hope that the cases in the median weight range would have a closer correlation between weight or volume, though I know there isn't a valid argument for that either.
 
Sorting your cases by weight won't make your 22-250 shoot any different.

FBecigneul said:
The ones that are the closest in weight are also closest in inside dimensions, since all the outside dimensions are the same.
Click to expand...

Not really true....cases have a rim and an extractor groove. But it's not hard to find out. Weigh a whole bunch of your prepped/fireformed brass and pick the heaviest piece, the lightest piece, and a bunch in between. Then check water volume of each one. I did it with a couple different brands of .223 and found there was no correlation between caseweight and case volume.
 
weighing cases

Your point is well taken. Normally I wouldnt weigh cases in that cal except for the fact that the gun hasnt shot factory ammo very well and I want to eliminate all the variables as much as possible. Once the snow is off the range i plan on spending quite a bit of time at the bench and really give it a good workout.

thanks to all,
John
 
If your gun doesn't shoot factory ammo well, it's about your gun not liking that particular powder/bullet combination. Also, notice how deeply factory 22-250 bullets are seated. Any caseweight variation has nothing to do with your gun's inaccuracy.
 
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