This is a 7.5 inch SAA and that could be, different lots etc...the chrony as well maybe, its a new cladwell G2, its what i have to rely on for now. It seems that my previous comment got shortened a little by accident me when i edited it. I was talking about the powder i make that shoots a 250 gr bullet at about 1020 fps with 30 grains by weight or 33 gr on the volumetric scale. I wont go higher than that, i kicks alot.
I cant figure out the picture posting thing here, but i detailed the results of ladder tests i did with swiss here on post
#4915.
https://castboolits.gunloads.com/showthread.php?103852-My-homemade-black-powder/page246
This is screenshot (#4964) of the chrony results from my newest powder.
https://castboolits.gunloads.com/showthread.php?103852-My-homemade-black-powder/page249
but you do have me wondering about this chronys calibration, i never really cared about absolute values onluy comparative. Ill test it with a standard load in a 5 inch 45 acp to see if it gives something way off. Irregardless, i didn't want to derail this thread, i think i might have a bit.