An OhNoSecond

[Lumpy Grits]

I think it was Lumpy that ran into the same problem with a different lot of Goex. I may be mistaken but I think he ended up just loading to the same volume and all remained well.

Yup-ME.
Like I said on Shiloh-Load same volume and see it it shoots to your sight settings.
My have to 'tweak' a couple of grains here n there.

Gary

[Old Jim]

It ain't just the Goex, as I opened some 1.5 Swiss lately, and the coloration between two cans of the same lot were different in the amount of Gloss/shineyness/color of the grains. When you open the can, you cain't return it to the seller, they say. I've heard that some folks open several cans of the same lot and BLEND/ stir them all together in a large container, but how consistent is that.
Dang it all,

[Lumpy Grits]

Jim-You can't ship powder or primers back to anydangbody........
I have mix lots of smokeless powder that I use for SASS/plinking with no issue.
Never will mix for what I call 'match' grade loading.
Gary

[Old Jim]

Heres what I WILL do;

I have an old bed-sheet, no holes in that one, and I plan to control dump each can seperatly from others and compare how they look.. The ones that "look" alike and screen the same go back into the cans. Any that don't look right goes on the yard. Grafs said its my powder and I can do whatever I want.

[Don McDowell]

Bonnie know what you're planning on doing? Or you figure you can get it done while she's gone to club.... LOL

[Lumpy Grits]

I would load test, and not depend on eyeballs here for a visible powder comparison.
Gary

[drcook]

Additionally, what I am trying to find out if anyone that has shot lots (like Kurt does) has noticed any correlation as to whether denser powder shoots faster/slower etc. It takes looking at a large sampling, such as the folks who shoot a couple cases of powder a year to notice. Of course it would have to be in the same brand because of potentially different manufacturing techniques.

I have noticed a difference in the densities between Swiss and Goex, but I have not shot enough/been involved in the sport enough to have experienced a large enough sampling.

I guess the best way to do this would be with a weight scale and a chronograph and 1 rifle, the same lot of primers, batch of bullets, etc. The problem is acquiring samples of differents lots. A person would have to start with a clean barrel for each shot, because accuracy is not a concern, just whether or not there is any correlation in performance to powder density.

I have some left over 45-100 loads that I could chronograph but a 2 lot sample would not provide a big enough picture to draw any conclusions from.

[Lumpy Grits]

Finer granulations like 3F will shoot 'faster' than 1 or 2F.
I load 3F Goex in both of my Shiloh's.
Never shot Swiss-Can't afford it's crazy high price.

Gary

[Old Jim]

When I say "look", I cull cases that don't look right, same with bullets, primers, wads and if powder catches my attention, I approach it with my magnifying-glass and run it thru a set of screens I stole when I left the State, and of course I weigh it.

Don, that old sheet had a corner cut-off to try as cleaning-patches, so it don't matter none now.

Dave always has a good suggestions, and I always consider them.

Thanks,

[Kurt]

Dave.

I don't know what makes one lot weigh more then the other. A slight mix of more potassium nitrate, sulfur, or what ever makes it weigh more. But it don't take much to get it shooting again like the previous lot did. I cant say if it shoots faster or not. I seldom set up a chronograph.

Jim,
I don't throw any powder away. Spilled powder, floor sweeping, unloaded cases all gets thrown into a coffee can. when the can gets a bunch in it I start classifying it from dust to several different size screens. The dust I use for priming the flintlock and the courser powder I also shoot in the muzzle loader and it shoots quite well. I don't waste any powder. It all gets used.

Kurt