chrono data contradicts load data...bigtime

[stangfish]

Hey solo. I find 44 gr varget LC 07 Brass is golden with most 168's in a factory chamber that I have seen. Addressing #1 What was the COAL out of your book? #2 only one way to find out. And #3 Non VLD in the lands often accompanies higher pressures from my experience.

How are your primer pockets. I often found loose primer pockets after crunching powder and jamming combined.

[Texas Solo]

Hey solo. I find 44 gr varget LC 07 Brass is golden with most 168's in a factory chamber that I have seen. Addressing #1 What was the COAL out of your book? #2 only one way to find out. And #3 Non VLD in the lands often accompanies higher pressures from my experience.

How are your primer pockets. I often found loose primer pockets after crunching powder and jamming combined.

Well, it's comforting to see the load is popular. In theory, it should not be over pressure. But the chrono readings say maybe so.

1) COAL from all the books say 2.800, as does Hodgdon site and SAAMI. But that's all relative to the bullet you're shooting. I'm under that spec, and maybe .001 > .002 off the lands. (weird ogive on this bullet)
2) already thought of that, but none of my cheap redneck friends have a chrono to compare....they barrow mine
3)I'm not actually "in" the lands, but just kissing them, or maybe .001 > .002 jump, best I can measure with an OAL gauge and comparator.

No idea on the primer pockets. I got 500 rds. of LC prepped to load and haven't tried to reload those I just shot.
But they should (?) be OK. I'm not crunching powder or jamming. The load volume is just short of the shoulder.

Maybe I'm being overly cautious (if there is such a thing). It's just that the 2900fps doesn't seem correct at 2.0gr UNDER the max, which yields 2750fps. With no signs anywhere of over pressure, I'm beginning to think my chrono is toast.

And on a brighter note, I popped 3 coyotes this AM with my AR :)

[darkker]

In theory, it should not be over pressure'

Unless you use your pressure trace, don't read chicken bones.... Brass tensile strength is typically around 70,000psi, you when you get difficult extraction; guess where your pressures are?!!
There was a member here I donated a 25-call barrel & bullets to, when he bought a PT from Rocky Raab. Was supposed to get some data from him as intellectual curiosity, but waiting for the miracle never gets us anywhere; so it was time to call that a lostt cause and buy my own equipment, and hope karma evens us in the end.

[Texas Solo]

BillPa...thanks for the data. Not sure what to believe now.

That data shows very comparable with Hodgdons data in terms of load volume/velocity, but they differ greatly in pressure.Your data shows 41,200CUP attained at 38.5gr, where as Hodgdon's data doesn't reach that pressure until 42.0gr
They show a max 50,600 CUP @ 46.0gr, your data shows 51,400 @ 43.0gr.

My head is spinning. To much thinking.