45 colt dies for 45 acp?

[Red9]

I have a set of lyman 45 colt dies. Crimp die is marked 45acp/colt.
Will the sizer work for acp? Or better to sell them?
Premium set with powder die.

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[ysr_racer]

The crimp die will, and the expander die probably will, but the sizing die won't.

[Sandspider500]

If it's a carbide die it might work

[Red9]

If it's a carbide die it might work

Hmm.
Didn't want to test a brand new die.
Sigh..

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[Red9]

The crimp die will, and the expander die probably will, but the sizing die won't.

Seems 5050 on that. Wanted to hear if anyone here tried it. Sizing is off, .07 I think on the colt vs acp?

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[Sandspider500]

I use a carbide 45 colt die to size 45 acp, it's a Lee die

[pennstater]

I use a carbide 45 colt die to size 45 acp, it's a Lee die

Hmm. Never even thought of doing that, as I have the specific dies for specific cartridge. How, exactly does that work? Not doubting, just don't know. Thanks.

[bruce381]

I use a carbide 45 colt die to size 45 acp, it's a Lee die

how a 45 acp case is .473 a 45 colt is .480 a colt die should NOT size a 45 acp at all? SAMMI specs

[Sandspider500]

how a 45 acp case is .473 a 45 colt is .480 a colt die should NOT size a 45 acp at all? SAMMI specs

Sometime around 1940-50 i don't really know when, 45 colt groove diameter was changed to .450 making it a lot easier for manufacturers to produce barrels for 45 acp and 45 colt. They now share the same groove diameter. They however did not change the saami cartridge(456 bullet) and chamber dimensions, which sucks because manufacturers such as Rossi and Ruger(in the past) built firearms in 45 colt with big chambers while remaining within saami tolerance. Ruger has fixed this issue by reaming their cylinders to .478. A 45 colt chamber can be as large as .484 at the mouth and .490 at the rear and still be within saami spec. Most 45 colt sizing dies are made for a .452 bullet, you cannot seat a 452 bullet in a .480 case, it will fall inside, no neck tension.

[Sandspider500]

Cases were sized with a 45 colt carbide sizing die.

[JagerDog]

My Hornady dies spec either (ACP or Colt).

Circa 1980?

[Sandspider500]

Hmm. Never even thought of doing that, as I have the specific dies for specific cartridge. How, exactly does that work? Not doubting, just don't know. Thanks.

Well, I take the 45 colt shell holder out and put a 45 acp shell holder in.

[bruce381]

Sometime around 1940-50 i don't really know when, 45 colt groove diameter was changed to .450 making it a lot easier for manufacturers to produce barrels for 45 acp and 45 colt. They now share the same groove diameter. They however did not change the saami cartridge(456 bullet) and chamber dimensions, which sucks because manufacturers such as Rossi and Ruger(in the past) built firearms in 45 colt with big chambers while remaining within saami tolerance. Ruger has fixed this issue by reaming their cylinders to .478. A 45 colt chamber can be as large as .484 at the mouth and .490 at the rear and still be within saami spec. Most 45 colt sizing dies are made for a .452 bullet, you cannot seat a 452 bullet in a .480 case, it will fall inside, no neck tension.

makes sense i learned something

[ar15barrels]

I have a set of lyman 45 colt dies. Crimp die is marked 45acp/colt.
Will the sizer work for acp?

Measure the inside diameter of the sizing die with calipers and report back the measurement.

[Red9]

Measure the inside diameter of the sizing die with calipers and report back the measurement.

I just bought a old heters set.

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