Case Weight Variation

[ShtrRdy]

How much spread in case weight do you guys who shoot precision long range find acceptable?

Is 1 gr on a .260 Rem case acceptable? (Average weight of 163 gr)

 

[Bluesop7]

Re: Case Weight Variation

I buy Lapua and don't worry about it. I've never weighed my brass so I'm not sure how much it varies but I have no problem making my ammo shoot.

 

[Topstrap]

Re: Case Weight Variation

Tried doing that a couple years ago, Remington seemed to have a big variation in weight but really didn't notice it affecting scores at the matches whether I sorted or not. Now we use Winchester and have never weighed any and it's not caused any problems.

Similar comments along the bullet weight variance can probably be expected. For the type of shooting most of us are doing on this site I don't think it matters.

Topstrap

 

[armorpl8chikn]

Re: Case Weight Variation

I used to weigh brass years ago, and that is why I no longer weigh brass.

This question has been answered many times here since 9/17/11.

There are far more useful things to do with your time rather than weigh brass.

Using brass weighing time, for shooting instead, is a perfect excample of time well spent.

I am not at all interested in giving you yet another treatise on why weighing brass is quite useless.

If you don't believe me now you never will. I appologize if this doesn't fit any preconceived notions, you may already have.

 

[Grump]

Re: Case Weight Variation

Search tip:

If you don't want to use the Google-based resource(s?) some of our members here have links to...

a + in front of ANY word is needed to make it "mandatory" for the search engine. It's not like Google, with a space between terms equalling an "and" connector.

You will find enlightenment and further information that way.

I know the L-D reloading thread says to sort brass by weight. Absent later-generated variations like some cases being trimmed and others not, a spread of only 1 grain--think about it--that's 1/7000 of a pound, 1/437.5 of an ounce, 0.7% of a 140-gr bullet's weight, and a shade over 2.4% of a 41-gr charge weight.

For my FC .308 brass, 1 grain is 0.56% of the unprimed case weight of the heavier ones (I had other reasons to weigh cases--thanks to QuickLOAD).

A sense of proportion is warranted here. If you want to check that stuff, once a batch is checked and found to be within 2 full grains (still probably needlessly tight), there's no real reason to check them again.

 

[Deadshot2]

Re: Case Weight Variation

Sorting by weight is a practice that's based on the assumption that a heavier case has less capacity and a lighter one more.

That's all true if all other case parameters are taken into consideration. Are all primer pockets the same depth??? All extractor grooves eqally cut???

These can change case weight yet not have any effect whatever ont he volume of the case. The only way to take away variances in volume would be to weigh cases dry, then filled with water. The difference would be an accurate measurement of the case volume, not overall weight.

That said, just get quality brass that's known for it's uniformity and pay more attention to the rest of the process.

I've always believed that more matches are won or lost by SHOOTERS, not ammo.