I just had a question that stumped me and provided some info that I didn’t know. I received the document below that shows that the 08mE loads have a larger powder charge than the lead core 08 loads (0.38g compared to 0.36 g, and indication that some mE loads used 0.40g). This makes sense to me. It also makes sense to me that the 08SE loads would have a larger powder charge than the o8mE since the SE bullets are lighter than the mE bullets.
Does anyone know (have documentation on) the powder charge in the 08SE loads?
The context of this question is that some MG shooters who have MP-40s contend that the o8mE load is not as accurate as other ammunition, and the theory is that it has higher recoil.
This begs the question about the 08mE boxes and cases marked “Only For MP”. These seem pretty scarce and I have assumed that they were lots of ammunition that tested out with a higher pressure and were reserved for machine pistols—but that was only an assumption with no evidence.
Does anyone know why the 08mE loads were loaded slightly hotter than the 08. I assume it was to componsate for the lighter bullet, but would it increase the recoil?
I’m interested in knowing what production lots of 08mE (or 08SE-though I have never seen one) were marked “only for MP”. Would those who have some boxes in the collection add the LOAD lot number (not the case head lot number) to this thread, or email them directly to me.
Does anyone know or have documentation on why the marking “only for MP” was used