Sounds likely!
Jeff and Jack,
I'm on board with the U.S. having CW projos. What I'm wondering, is if the projo shown by Jeff is 75mm or 3 inch because it has two crimping grooves?
All of the U.S. 75mm CW stuff I've seen had no crimping grooves, as can be seen in the two 75mm projos on the left of the attached photo.
The U.S. 3 inch field gun used two crimping grooves as shown in the third projo in my photo, and the 2.95 inch mountain howitzer and the 2.95 inch subcaliber gun also had double criping grooves as shown on the shrapnel projo.
Jeff, do you know of CW fillings for the 3 inch field gun and/or the 2.95 inch?
Hey Peteblight
Having read the post by US-Subs and noting your avatar, I thought you might like a couple of x-rays of the US 75mm MKII. You can see in the first picture the polymerised thickened material makes it harder to identify the liquid fill level. Turning the shell upside down will sometimes solve the problem as in the second picture. X
John,
I had this conversation with Jim O'Brien one time, and as I recall, he told me at that time that the two grooves were most often found on the 3-inch, but not only. At that time he advised me that the better indicator is the height of the rotating band from the base. The high band was 75mm, the low band the 3-inch. His refs were always much better than anyone elses, I guess the research is now up to you up to you.
Of course I didn't have a scale in the photo, I've been having problems finding good metric scales for my photos, and when I do I don't want to get them contaminated and give them up.
I'll check a couple refs and see what I can find on the 3-inch fills, Prentiss should have some good info.
In the meantime, here are a couple photos given to me by the site. They did a lot of good work figuring this out. The first is a mustard filled projo, the second is WP. Both were heated as described earlier. Note the double fill level on the WP. Well done boys.