Never give up, I would of given it a shot. If nothing else the part obstruction in that 88mm bore would have jacked up the pressures. And it would of been more fun than just setting there, with your arse hanging in the breeze!

The types of arming projectile's were around even before WWII.

At least that's what they told us in school for EOD, in fact as I recall, all 167 types of fuses were around from before the 2nd. I don't think all the sub categories were however.