CSA .40-70 Straight success finally...kind of

[Martini2]

Hope you get the 40-70 Straight perking again soon. I just performed maintenance on my '74. Albeit a replica, the action block is pulled and firing pin removed for cleaning. Mine has the two piece type I.E. a transfer bar and separate pin with return spring. While cleaning the firing pin cavity a few bits of brass were removed. This accounts from not placing hammer at 1/2 cock before dropping the block. In this case my replacement firing pin was lengthened to make sure it stays in the firing pin hole in breach block. Pin was fit so it does not remain proud of the block face when retracted with no contact with hammer. But a bit of crud build up and there may be drag marks on case head to show if hammer is left down after firing. Keeping the firing pin channel clean may keep your '74 ticking.