I weighed a tin of 30 JSB 44g and they were all the same weight! didn't bother weighing the rest of the tins form the batch.
In all fairness though it's a bit futile IMO with such a heavy pellet, fair enough a 1 grain difference on an 8.44g pellet is huge, however on a 44g pellet is only a couple of percent.
If you think that fliers are caused by weight alone then surely that would only be a difference in POI drop? I experience flyers to the left/right/up/down from a group.
I also seem to get no flyers as yet from the 30 cal! maybe I struck lucky on the batch?
This is only the second time I have weighed a 5 tin sample. Each time the five tins were from the same order, so my assumption is they were from the same manufacturing lot (take that with a grain of salt, because it's an assumption). My first results were almost the same spread and distribution as this time. If you're saying you weighed a tin of these pellets and had no variability in weight (a 150 count tin where all the pellets were the same weight), I have to think there is something not as it appears. Were you weighing on a scale that had a 0.1 gr resolution, or weighing to the nearest whole 1 grain? I ask this because every manufacturing process has variability, On a good scale reading to 0.1 gr, I don't think anyone will find a tin of these pellets that does not show different weights. Measuring to the nearest whole gr... maybe a tin of all 44 gr or a tin of all 45 gr, but even that would seem odd to me based on the spreads I've seen. But, like I said... I've only sampled twice. That's hardly proof-positive.
What gave you the impression I think fliers are caused by weight alone? I said I weigh the pellets to eliminate "the weight based fliers while looking at groups". If all of my pellets for a group are the same weight to 0.1 gr, and I have a flier, I can reasonable eliminate a heavier or lighter pellet from the tin as being the source, thus I have eliminated "weight based" fliers. And yes, I would expect this to manifest itself as a vertical shift in POI. Any source of variability in our shooting system could cause fliers. Slight damage to the head of the pellet could cause spiraling and produce a flier as well (these could show up as high, low, left or right, as you mentioned your fliers do). This is why there was a cup with "Culls/Scrubs" in it. These were the pellets with skirt issues or significant head dings on them.
Now, the real question is that which Wildcatfun asks... does a 1 gr difference in pellet weight for a .30 cal 45 gr pellet show up as POI shift? I don't know yet. Hopefully as I characterize this new gun, I can shoot a 10-shot group with 10 pellets at 44.4 gr, and another 10-shot group with pellets at 45.4 gr on the same target, and we'll see. While I agree that just over a 2% change in pellet weight seems VERY insignificant, when we start shooting these things to 100 yards, we are really stretching the envelope of the airgun/pellet system. My initial tests and sighting in will be at 50 yards, and I'll bet there is a group POI shift of a small amount even at 50 vs 100 yards. But... we'll see. It would be very sweet if there was no visible POI shift at all, but that would surprise me. I would LOVE to know I can just wash, lube and shoot them, and forget the weighing part.
It's cold and rainy here (central Indiana). Not sure when things will be nice enough to go out and actually do this. When I do, though, I'll post the results.
