I'm a little confused about what model rolling block I have and how to find a firing pin.
45-70, I believe it is a Perdersoli.  Barrel is marked under the forend "Lone Star Rifle Co. Conroe, Texas"
Action is marked on the forward face with presumably a serial number and "CAT. 3514"

The firing pin is probably functional but has been welded on the back end and ground down not very carefully, I'd like to replace with a better part.
The parts diagrams I can find don't match what my breach block and firing pin retainer look like. It is different than a new Pedersoli I also have.

This older one has a stamped metal finger pined in the breach block that retains the firing pin.  I'm unclear if it does any more than that, it seems like a fussy way to do the job.  this finger is also not in very good shape on the top end. 
Certainly a different method than the later model with a little screw to retain the firing pin.

Overall length as modified 1.010"
Pin length approximately 0.214"
Diameter 0.235"

Vti gun parts shows the following but I don't believe it's what I need??
0800004458
Pedersoli Firing Pin (Rolling Block Target, Silhouette, Long Range Creedmoor, No 1 Sporting, Super Match) Overall Length 0.9125", Pin Length 0.228" As of 2017 All RB use 0800004458Pedersoli Firing Pin (Rolling Block John Bodine, Cavalry, Creedmoor, Mississippi .22,.45, .357) Overall Length 0.911", Pin Length 0.2870" - Stepped Shoulder - as of 2017 All Rolling Blocks use this FP

Is this a part I can still purchase somewhere?
I'm open to making a new one with a little bit of advise on how to.  I am a machinist however I lack experience working on firearms.

Thanks for the help.

I’m surprised no one has jumped on this.  I wouldn’t have a clue where to get parts but if you have the equipment grab a piece of O-1 and make a new pin.  Looks pretty simple.  You’ve got it apart and that’s all the experience you need.   
Bob

And no one mentioned  the Lone Star Rifle company from the late Dave Higginbotham, even stranger...  Standard RB parts should work, no?

MartiniBelgian wrote on Feb 13^th, 2024 at 1:22pm:


That would be a "No".

Thanks for the info and links.

I'm not sure the tapered firing pin with sloped back end from Numrich is correct, though that parts diagram does show the same style firing pin retractor.

Possibly the pin from Pedersoli from VTI but I think it would be to short.  Might be what the modified one I have started as and didn't fit/function?

So far leaning toward making one, I'll do some more studying.

I believe Dave Higginbotham installed or replaced the barrel on an existing action, it probably wasn't one of his full custom rifles.  Although I believe he also started with Pedersoli actions? Who knows more of that history?
I'll ask the friend I got this one from for more details on it, I believe he had Dave do the work some years ago.

Thanks,
Grigg

Grigg wrote on Feb 13^th, 2024 at 9:29pm:


The firing pin from Numrich is sloped on the front half, not back end. And it's an original Remington part from the run of Rollers they made in 1997, so it is exactly like what Remington used back in the 1800's. I've purchased a bunch of those parts from Numrich for Rolling Block projects, and amazed at how well they fit older Rolling Block actions.
Numrich can be hit or miss on repro parts often, but since these are not made for them they're good. Just maybe not what your Pedersoli-Lone Star might use.

Never owned a Pedersoli, but original Rolling Blocks had the firing pin cut so the rear of the pins were flush to the breech block, and nothing above. This kept the hammer from peening the back of the pin as it was stopped by the breech block.
I push the firing pin into the block until it bottoms, and then use a Sharpie felt pen to mark what sits above the block. Then cut off the excess.