Not what you are looking for, but maybe a helpful hint. This spring on a perfect overcast calm day, 6.5 Swede 96 bubba sniper, 140 SST, I put 5 shots in 5 1/2" at 600 yards. I don't chase jump dimensions unless necessary, and I seated these with the boat tail shoulder even with the neck shoulder...a big jump in a '96 Swede. I was going to try a ladder test, but stopped after firing the above group, first group, not counting foulers.
Very nice flintlocke. Great shooting. Was that with irons? "bubba sniper" probably meaning it was scoped?? I'd love to test my 96 out at 600, but I'm afraid my eyesight is not good enough for that anymore!!! So it appears that these bullets are not that jump sensitive. Your post reminds me that I tested the 140gr SST in my 96 swede as well. They seemed to shoot well, but not quite as well as the Sierra MK's or ELDM's. Thanks for your input buddy.. Oh by the way, I was out shooting at my new 1,000 yard range the other day and sent some to 600 on paper. Not with the 270 or 6.5 Swede, but with the Creedmoor. Was fun to see how the new 147gr load did in my back up rifle.
(5 shots into 2.9"). Same as 500 yard repair center. 1000 yard F class repair center.
I also got a good PM from my buddy keith. He basically told me to do what I was already doing, except try a different primer. I think I'll do that, but was hoping for a little better results. The magnum primer may be the ticket?? A little testing down at the range will confirm that.