Thread: New Winchester Powder (StaBALL 6.5) and a good video on temp stability

Winchester StaBALL 6.5, looks like and interesting powder that may knock RL-16 off its perch?

50C temperature difference is A LOT but good to see that I can stick with H4350/AR2209.

Originally Posted by JaSa

50C temperature difference is A LOT but good to see that I can stick with H4350/AR2209.

Yeah 50C is more than anyone will see in real life.
But what got me keen on this powder is the velocity than can be achieved 150-200fps higher in most cases over a single based powder and more temp stable than RL-17.
Check out the load data it looks good for all 6.5 short action cartridges and 7mm08, I haven't looked but I'm picking 270, 280, 284 and 3006 will be good as well.

Wow 17,000 fps with a start load using 140 grain projectiles, on that chart from hogden.
I think it still needs a bit of work.
Try typing in 6.5 CM with 140's and you'll see what I mean

140 GR. SFT A-FRAME is defiantly a Typo, check the 140 GR. HDY A-MAX below

Maybe i could get a job poof reeding.

Originally Posted by johnd

Maybe i could get a job poof reeding.

spoof reading?

Hi all just watched the video and my concerns about RE 17 and temperature stability are confirmed. However when I considered the likely 130 FPS fluctuation and put it into my ballistic programme for my 284 I found with a 130 FPS difference between 3000 and 2870 FPS the difference at 400m was 1.8” lower for the slow load. So for me the instability for most of my hunting with the 284 will not make a significant impact. If I am shooting longer I’ll bring out the 30-06 with VV N550. Putting it into context certainly stopped me from worrying about it. I am keen now to see if the fluctuations are linear in nature which would allow for it to be calculated like windage etc.
Cheers 7mm

Originally Posted by winaa

Yeah 50C is more than anyone will see in real life.

Not done much South Island High country winter/summer shooting then?

Nope but if you go from -15 to +35 in NZ i'd be surprised

might be good in a 6.5 06 if it gets done

I have been wondering about the whole gambit, and how big the effect is on accuracy at under 600 yds
The variation in charge weights Verses the variation in case capacity verse the variation in projectile weight.
So when all the stars align ( or misalign ) with that super cold day and the under weight charge by .1 grain and the case capacity volume goes up by the .5 grain and the projectile goes heavy by .1 grain, and the depth lengthens by 2thou....... what IS the end result as measured at the target?
And if its less then 1/2 an MOA does it matter?

Just to be pedantic some parts in inland Otargo / Canterbury can go from -10 to plus 40 C.
Not that I know many guys who would be hunting in Plus 40 C, can't see any meat keeping for long and the pests would be well hidden away.
Z