I've found someone who will rechamber a Siace .45-70 to .45-120 or .45-100 for me, now I'm just left with the dilemma as to whether or not it's a risk worth taking.

What are the chances that simply reaming an already regulated .45-70 double to .45-120 will actually leave you with a shooter?

PWN375 had his Pedersolli 45/70 rechambered to 450#2. It did not require re-regulation. He did describe the recoil of the rechambered rifle. . . .Brisk!

With your rechambering I have no idea. You won't know til ya try it!

The SIACE is designed around and proofed for the 45-70. Why screw around with it and possibly hurt the gun or yourself? Why not just buy a 450 3 1/4 and get a gun already proofed and regulated from the factory?

quote:

Originally posted by Rusty:
PWN375 had his Pedersolli 45/70 rechambered to 450#2. It did not require re-regulation. He did describe the recoil of the rechambered rifle. . . .Brisk!

With your rechambering I have no idea. You won't know til ya try it!

Rusty,

That rifle was eventually discovered down the warthog hole I dropped it into. The fellow who found it has been whacking wounded buffalo and other game with it in Mozambique for the past 6 years. He has fired many rounds down the barrel and reports the gun is still tight and functioning perfectly. He also says recoil is still "brisk" when he is practicing.

After rechambering the only adjustment I made was an elevation adjustment to the sights because it shot a bit lower as a 450#2 than it did as a 45-70. I shot a SIACE that has been rechambered from 45-70 to 450NE. The owner said it regulated perfectly but also required an elevation adjustment. It was more "brisk" than my Pedersoli and very painful to my cheek.

Perry

I also have a Pedersoli that was re-chambered from 45-70 to 458RCBS, and it did not require re-regulating either. The 458 RCBS is simply a hot 45-100, and loads for it are heavier than reccomended for most 45-100 rifles, but I have has zero problem with this rifle.

It is going to Conroe, Texas for another re-chambering to 450NE 3 1/4" as we speak!

I don't know anything about the Siace rifles so this doesn't help you, but re-chambering a double rifle is not always a mistake, but it does present a certain amout of risk, depending on who does the work, and wht doner rifle is used!

Ok, so it could be a straight forward project, just one thing, since loading the .45-120 with smokeless powder isn't going to all that simple, as there are very few powders available here, is there another chambering that might be more suitable?

Mac, The .458RCBS is about the same as the .45-100 in case capacity, correct? How did you get around the smaller and thinner rim when rechambering?