I had some assorted primed brass that had wrinkles in the cases.
Since they were somewhat disposable I used them to try BENCHMARK as a 45-70 powder.
My rifle is a Browning Model 86 carbine, with fairly shallow rifling so I used 350 grain Hornady jacketed soft points.
54.0 grains Benchmark and the cases loaded to 2.530 COL or as close as I could get with wrinkled cases.
Lee Factory crimp die was use.
The average velocity was 1,875 fps.
The cases were SUPER clean, with only slight pressure signs on the Remington cases. The Federal cases did not show any and the Winchester cases only showed the slightest pressure indications.
I only got a 2 inch group with the iron sights at 100 yards, but it was fairly cool (about 5 degrees) and windy... So I was in a hurry to get done..