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Only one T15E1 gun (with extra long single piece round) was produced, and that gun saw combat. But if there was only one, it may be tough to get data for that gun.

I read somewhere that Hunnicutt's penetration was for the T15E2 gun; post #3 says the T15E1 gun! I don't know which is correct. 25 of the T15E2 were apparently produced, and they had two piece ammo.

You would expect the extra fps over the L53 to give better penetration, unless there was something inferior about the two part shells for the T15E2.

The numbers are so close between the L53 and L73 that it could be that someone mistakenly published the L53 data as L73 and the mistake was then copied in other places.

Perhaps source 3 was the only correct data, and they forgot to mention it was at 30deg?

Keep digging and you may figure it out.

I'll see if can find a good source if I get time.


Cross