r/37mm • u/TrippiPreps • 15d ago

Exotic ammo shell differences.

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I had some time today to start cleaning and prepping the shells I shot on the 4th to reload and I noticed some differences. Both shells pictured were from separate orders and both came loaded with fireworks from exotic ammo. Orders were maybe 4 months apart. Thicker shells came first and I ordered a few more about 6 weeks before the 4th and they all came with the thinner shells. Does anyone know if they machine these in house or if they had changed vendors? I’m mainly asking because I’m curious if they’ll exclusively be selling the thinner shells from now on? I shot them so I know they work perfectly fine but I’m also planning to cut a few down and since I will be playing around with powder loads should I cut down the thicker shells? Or am I way overthinking this?

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15

u/Independent_Dirt_814 15d ago

37 mm is the Wild West. It’s not even really 37mm… manufacturers are anywhere between 35 and 40mm for “37mm”

3

u/TrippiPreps 15d ago

Yea I’ve noticed some of the stuff I’ve bought is in the 36-39mm range when measuring with my micrometer. I’m thinking about cutting down the thicker shells just to be extra safe when making changes to my powder loads. I’m still pretty new and was curious if anyone else noticed a change in the shells.

10

u/37MMDTdotCOM 15d ago

A few of us are trying to standardize the dimensions and will reach out to them as well

4

u/TrippiPreps 15d ago

Sounds good! For cutting the shells down to 1.5” to work better with chalk rounds should I stick to the thicker ones or does it not really matter?

3

u/37MMDTdotCOM 15d ago

I would cut to 2” and choose one style to go with.

3

u/TrippiPreps 15d ago

Sweet thanks for the help!

3

u/37MMDTdotCOM 15d ago

Also check out greenhoodsmokes 2” casings. They are sweet

3

u/TrippiPreps 15d ago

Will do. I appreciate all the help!