This past deer season while hunting with my mod 70 winchester 270 one round's bullet stuck in the throat when I tried to unload it. Most of the case of powder poured into the action and made quite a mess. Back in camp I removed the bolt and cleaned out the coarse grain powder as well as possible. After replacing the bolt the rifle wouldn't stay cocked when the bolt was closed. Having a spare rifle available I could continue to hunt and ended up shooting a buck the next day. A wilderness hunt where no spare rifle was available might have ended badly though.
later at home I took the rifle out of the stock and could see that the trigger part that catches and holds back the firing pin was not sticking up high enough. It rotates into a slot on the bottom of the receiver but was being blocked from reaching its full rotation. Thinking it was almost certainly more of the spilled powder causing this I depressed that part and blew and scraped in the slot. Fortunately that fixed the problem and the rifle would cock normally when the bolt closed. I didn't have to disassemble the trigger to clear the blockage.
The lesson learned (relearned?) of course is to always check reloaded ammo for functioning before a hunting trip. I know I ran these cartridges through the action but for some reason didn't catch the defective round.
I figured posting my experience might help somebody with a similar model 70 malfunction