Shotshell shot cup diameter

piratecountry · February 1, 2018, 04:59 PM

Can anyone tell me the diameter of a 12 ga and 20 ga shotshell cup?? I have searched everywhere with no results. I am working a Homicide and the question has come up. Thank you in advance.

rg1 · February 1, 2018, 07:01 PM

Trying to measure a molded plastic flexible wad isn't exact. You're talking about the diameter of the cup on the plastic wads?
Roughly measured a few new unfired wads.
12 ga. WAA 12R-----------.712" both at the driving band and at the base of the cup where the shot fills.
12 ga. Claybuster CB118-------.695 on the driving band---.703" base of shot cup
12 ga.Rem RXP 12-----.696" ----------------------.702" at bottom of cup
12 ga. Rem R12H------.702 both places
20 ga. Win WAA20-----.603" on the driving band---------.585" at base of shot cup
20 ga. Claybuster CB1078----------.590" both places
20 ga. Rem SP20-----------.595"- .602" both places.
These measurements are approximate. They can vary as much as .010" as they are not perfectly round.

piratecountry · February 2, 2018, 07:14 PM

Thanks alot for the input. I pulled some from shells but didn't have any unfired. Your info helped alot thanks again.

Dan

February 1, 2018, 04:59 PM	#1
piratecountry Member Join Date: December 26, 2005 Location: NC Posts: 27	Shotshell shot cup diameter Can anyone tell me the diameter of a 12 ga and 20 ga shotshell cup?? I have searched everywhere with no results. I am working a Homicide and the question has come up. Thank you in advance.

February 1, 2018, 07:01 PM	#2
rg1 Senior Member Join Date: November 6, 2001 Posts: 1,125	Trying to measure a molded plastic flexible wad isn't exact. You're talking about the diameter of the cup on the plastic wads? Roughly measured a few new unfired wads. 12 ga. WAA 12R-----------.712" both at the driving band and at the base of the cup where the shot fills. 12 ga. Claybuster CB118-------.695 on the driving band---.703" base of shot cup 12 ga.Rem RXP 12-----.696" ----------------------.702" at bottom of cup 12 ga. Rem R12H------.702 both places 20 ga. Win WAA20-----.603" on the driving band---------.585" at base of shot cup 20 ga. Claybuster CB1078----------.590" both places 20 ga. Rem SP20-----------.595"- .602" both places. These measurements are approximate. They can vary as much as .010" as they are not perfectly round. Last edited by rg1; February 1, 2018 at 07:09 PM.

February 2, 2018, 07:14 PM	#3
piratecountry Member Join Date: December 26, 2005 Location: NC Posts: 27	Thanks alot for the input. I pulled some from shells but didn't have any unfired. Your info helped alot thanks again. Dan