Here's a round I've never seen before

[Skunk1]

Bought some loaded, "collectable?" mixed ammo. Had 2 of these in with them. Headstamp is hard to read but has quite a few numbers. Never seen anything like it. Looks wicked. 30/30 case for comparison.
158688

[petroid]

looks like it was a blank

[Nueces]

Except for your description of the headstamp, I'd say it looks like a Remington 45-70 round with the bullet jacket bonded to the case neck and the lead core blown down the barrel.

[Skunk1]

No 45-70 numbers. I'll have to look again with a magnifying glass. Loaded round and the spikes make it look like a blown out round. Actually, it's got a little heft to it.

[Skipper]

No 45-70 numbers. I'll have to look again with a magnifying glass. Loaded round and the spikes make it look like a blown out round. Actually, it's got a little heft to it.

Line throwing blank.

[SWANEEDB]

Military primer from a very large shell, cannon shell, forget which one.

[Kevin Rohrer]

Military primer from a very large shell, cannon shell, forget which one.

I think the Army's 8" stuff used separate primers that look like shotgun shells.

[cheese1566]

Yep. I have one that looks exactly that. Brother in the national guard shot howitzers.

[M-Tecs]

The artillery shell primers that I have seen that look like that are electronically fired. I am guessing it doesn't have a firing pin indent?

[Skunk1]

Here's another
158702

[M-Tecs]

Yep, it's an electronically fired artillery shell primer.

[Dan Cash]

It is a percussion fired primer round for an artillery piece that uses bagged powder charges. Being a tanker and not a red leg, I don't know which gun used it. It is essentially a .45-70 super blank.

[M-Tecs]

If it's percussion fired shouldn't the pic in post 10 have a firing pin indent?

[Mk42gunner]

I've popped about a jillion of those electrically fired primers while doing prefire checks on 5"/54 cal guns. 3"/50 and I think the 5"/38 were percussion fired.

The 3"/50 primers were supposed to have a bit more power than the .45-70 line throwing blanks the Navy used to use. Couldn't prove it by me, by the time I got on my first ship in 1987 we were using M-14's with grenade cartridges and MK 87 adapter kits for line throwing.

Robert