Yeah the Sierra single shot pistol was 135gr in .308 . Man that would be a great bullet to bring back for the blackout. I assume pure lead core so it was nice and soft with a thin jacket.
We ran that SSP bullet in the 30-30 contender and got zero expansion out of it on some pigs and deer. Was told by Sierra to run it harder... well the load wasn't book max, but not far off max loads, maybe a couple grains. And we tossed that idea out the window and started with 125 barnes and did just fine. I"m not sure why that sierra wouldn't open. But it never did on lung shots.
