75mm Recoiless


#1

Ok, you guys did so well on the 106mm Recoiless, let’s move on to the 75mm Recoiless

  1. I have case with “SHELL M309” stenciled on the base of it. What loading is this? There is no impressed case type information.

  2. Stenciled on a 75MM M31A1 case is "SHELL HE???E21. What is missing and what loading is it?

Anyone have a manual for the ammunition types?


#2

The 75mm recoilless rifle cartridge M309 was made in several variants. It basically was the standard HE (High Explosive) load with a PD (Point Detonating) Fuse, or a MTSQ (Mechanical Time Super Quick) Fuse. The M309 used a paper liner in the perforated cartridge case M31 or M31A1 while the M309A1 used a plastic liner. There were also a TP (Target Practice) M309A1 with only a small spotting charge in the projectile and also M309 or M309A1 TP with Inert Projectiles and paper or plastic liners respectively.

I cannot help on the second question. My guess would be that it may be a pre-standardization loading of what became the HEAT M310 which used a shaped charge warhead, but that is only a guess.


#3

The second question doesn’t make sence to me neither.
Pre-standardization is not likely. These are H.E. T38 or H.E.A.T. T39.
That should stand for 6x ???E21
Recoilless ammo is one of my favorites. I hope more help will follow.

About the manual, tried to sent you but failed.
Please check this link
lexpev.nl/manuals/unitedstates.html
download the TM 9-1300-204 Ammunition for Recoilless Rifles 1959
Lex has a large list of manuals free for your own use. This would keep you busy for the long nights to come!


#4

John S. and Western–Thanks for the information.

Western–The number of “?” does not reflect the number of missing characters. I have no idea how many are missing.
The “SHELL HE???E21” is all that is readable with a 1 1/2 inch gap between “HE” and “E21”

Another FANTASTIC link for manuals.