This is a subject I have been trying to resolve for a while.
While I agree with Mr.16 Gauge to check the different manuals, some of the illustrations are not very clear and the descriptions donít tell you much. I have an older book The Handbook of Shotshell Reloading, copyright 1984, that describes the different hulls fairly clear and even tells you the different brand names they were loaded in, Field, Hi-Power, for Federal, Dove & Quail, Upland, for Winchester, Field, and Premier, for Remington they each have more.
I have contacted Federal And Remington. Here is the question I asked,
I am a shotshell reloader and would like to know how many different hulls you make? Could you please tell me which ones are which, as it is hard to tell. Different publications say different things and it gets really confusing. I don't want to make a mistake when I reload them.
Here is the response from each;
#1; Gold Medal is a one piece plastic
We also offer a few loads with a one piece hull but it is not the same as
the Gold Medal.Steel loads etc.
Most others such as Top Gun,Hunting hulls etc have the same Internal volume
#2; We make three different hulls
All paper hull, the Gold Medal unibody( Gold Medal headstamp)and all others
are hunting type with a paper basewad.
#1; Thank you for your inquiry. The STS,Nitro, and Handicap are Unibody style hulls, the majority of the other hulls that we produce are of a 3 piece RTL design.
#2; Thank you for your inquiry. The ribbed hulls are normally a given sign that the shells are of a three piece design. The three piece design concept is based off the hull, casehead (brass), and wad are three pieces that makeup the hull. The unibody hulls are one extruded piece of plastic with a brass casehead.
Really cleared things up didnít they?
I have done cross sections on several myself, a lot look the same, but itís still pretty iffy with others.
I wouldnít be so concerned but I do quite a bit of shooting, target and just plain plinking and donít really want to use my good mts for plinking but am concerned about high pressures. If you or anybody else comes up with anything PLEASE contact me.