Hunting boolit consistancy?

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I weighed a bunch of 308 diameter 165 speer grandslams I was loading today and results were, um well I don't know. I can't tell you how old these ones are but I weighed about 50 or more of them and found what I think is a wide spread in weight.:confused: Lowest measured was 164.8 grains, highest 167.1 I ended up segregating them into lots with a spread of .4 grains.
Is this what one should expect with hunting bullets or is this lot a poor example? I'm using these for the upcoming deer season since I've had them onhand, but I'm looking at 150 grain partitions, or possibly accubonds for next season. What's the most consistant bullet out there? I'm planning to try to milk the most accuracy from my hunting ammo by using match grade brass and careful assembly of quality components, since after all shot placement is paramount.;) Anyone out there weighed lots of hunting style bullets chime in, or am I retarted for thinking about this?
 
Weighed a bunch of .308 Horn. SST 165grn not to long ago, ranged from 164.5-165(none went over 165) weighed about 30 of a box of 100, so I just left them as they were. But with the amount of weight diff. in your bullets, maybe it was a good idea to seperate them in to weight groups! Pretty new to this loading, will be following this one close!! Great question!!!

Perry
 
If you sit down to a ballistics program that uses both BC and weight to calc flightpath, you'll fing you can change weight a lot more than that before you effect flight. Not so with BC though. That cant change much. Not sayin they still shouldnt do better
 
Grand Slam bullets are built for terminal performance, not tack driveing accuracy. Their jackets are not overly concentric as far as thickness goes either. This will effect accuracy far more than a grain of weight deviation in the bullet or 2/10 grains of powder will. The real difference between match bullets and hunting bullets is in jacket thickness consistancy.

I once went through a lot of trouble to swage my own match bullets because I couldn't buy bullets that could be trusted. With the advent of the Juenke Gauge into the industry, this mostly changed for the better. J4 jackets are now extremely consistant, mainly because it is now very easy to measure the jacket thicknesses and moniter the wear on the swageing equipment.
The weight deviations are comeing from the cores. Either the core wire is inconsistant in weight or they are useing (most likley) several different swageing machines with slightly different diameters and or slightly different cutoff lengths, though only by a very slight amount.
I'm not trying to knock your accuracy concerns, just trying to open up some more information for you.
Those Grand Slam bullets should give you plenty good enough accuracy out to reasonable hunting ranges of say, 400 meters. Once you start shooting further than that you will probably want and need more specialised equipment that is more suitable.
Happy hunting and straight shooting, Bearhunter
 
I haven't looked it up in the manual or anything, but my father tells me that is .375 cal, 300gr Sierra Gamekings are supposed to have up to 10 grains of variation. I think your +/- 1 grain won't make any difference in a real hunting situation.
 
Even Sierra Matchkings will vary in weight. Match grade brass in a hunting rifle is not required unless it makes you feel better. Load up a few rounds with bullets at the extreme ends of the spectrum I will bet they group pretty damn close.

At one time I shot some 155 gr match bullets from Sierra, Nosler and Lapua(left overs from matches). All different weights of brass from 171 gr to 175 gr. At 100 yards they all went through the same hole at less then 1 MOA.
 
The Grand Slam bullets were a dual core bullet and I wouldn'tbe surprised if weight variation was bit higher than bullet with homogenous core. 180 Grand Slams are among the most accurate of bullets in my 308 Norma so I guess it doesn't matter much. Back in the days when I was curious about such things, I weighed bullets a lot. Some Speer 400 grain 45 cal bullets were among the most consistent I weighed. About .4 grain variation for a box of 50. I no longer care so haven't weighed a bullet in years.GD
 
I have weighed bullets and found little variation.
my first venture into weighing components was with brass first and found one box of Dominion 30-06 varied 186 to 203 and the second box from 183 - 206. Ended up with one decent box. 2 boxes of Norma 6mm Rem varied 0.8 grains.
Five lots of Winchester 308 powder varied 2.1 in one box, and 3.5 grains over the 5 lots.
Powder and Brass weights are the most important.
 
I just weighed 4 boxes of bullets with the following results.
7mm mrx-139.8 to 140.5
7mm ballistic tip 139.9 to 140.2

.308" ballistic point 179.8 to 180.2
.308" tsx 179.9 to 180.2

The worst variation was .7 grains with the best .3 grains.
 
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