Which 45-70 FL sizing die for PP chamber

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MikeT
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Which 45-70 FL sizing die for PP chamber

Post by MikeT » Fri Nov 09, 2018 2:57 pm

Which brand 45-70 FL sizing die is recommended for new cases to fit the 45-70 PP chamber?
I have Lyman dies, will they size down for enough for the PP chamber?

Thanks,
MikeT

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Lumpy Grits
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Re: Which 45-70 FL sizing die for PP chamber

Post by Lumpy Grits » Fri Nov 09, 2018 3:34 pm

Try it and see.
I use a .45-90 FL sizer for my std chamber Shiloh, as you work the brass less.
Gary
"Hav'n you along, is like loose'n two good men"

gunlaker
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Re: Which 45-70 FL sizing die for PP chamber

Post by gunlaker » Fri Nov 09, 2018 6:56 pm

I don't know which chamber you have, but I can say that in my rifles with Dan T's .45-70 PP chamber ( 0.474" case mouth ) I can use an RCBS FL sizing die and the cases will chamber. In my .45-90 with Dan's PP chamber I full length size them and then take them down a little more with a .45 Colt die and then fireform them.

If full length sizing isn't enough, then maybe the .45 Colt die trick will work for you too.

Chris.

MikeT
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Re: Which 45-70 FL sizing die for PP chamber

Post by MikeT » Sat Nov 10, 2018 9:32 am

Chris,
I do not have the rifle yet. My 77 is in production now and it will have the Shiloh PP chamber for the 45-70.
Will your DT PP chamber allow groove diameter bullets to be chambered?

Thanks for your reply.
MikeT

gunlaker
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Re: Which 45-70 FL sizing die for PP chamber

Post by gunlaker » Sat Nov 10, 2018 5:04 pm

No, it's for bore diameter bullets only.

Chris.

D. Taylor Sapergia
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Re: Which 45-70 FL sizing die for PP chamber

Post by D. Taylor Sapergia » Fri Nov 16, 2018 12:41 pm

My new Shiloh has a 45-70 chamber with a 7 degree leade. I seat my BORE diameter pp'd bullets so that there is only about 1/8" of bullet in the case, and they chamber nicely. Grease groove bullets, such at Lyman's 457125 (a very accurate bullet btw) need to be seated almost to the ogive. So powder capacity is limited to abut 65 gr. Swiss 1 1/2 Fg.
To size my cases tight enough to support the .450" pp'd bullet, I use a .45 ACP die with a 1/2" ID copper pipe sleeve as a stop to get uniform case mouth sizing. I made my own expanding button exactly .450".
Brand new brass gets full length sized in a Lyman FL sizing die, but only for the first firing in this chamber. After that, only the case mouth/neck gets sized.

MikeT
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Joined: Sun May 25, 2003 7:48 pm
Location: Saint Cloud, MN

Re: Which 45-70 FL sizing die for PP chamber

Post by MikeT » Sat Nov 17, 2018 9:28 pm

D. Taylor Sapergia,
I have the 7 degree lead in a couple of my 40 caliber rifles. The 7 degree lead is used in a GG chamber, it is not the PP chamber.
My understanding of the PP chamber is that a groove diameter bullet will not chamber in the PP chamber.

Keep on hav'n fun!
MikeT

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