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Old 07-14-2011, 02:58 PM
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Mittelmorder Mittelmorder is offline
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Default 37MM Reloading guides and tips?

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I'm getting a 37MM soon and I've been finding it hard to locate in depth reloading guides for different legal 37mm munitions. Mainly I'm trying to find info regarding how much and what types of powders are safe so I can be confident that I'm not going to blow my hand off.


I've found that guide in particular which says to use between 40 and 80 grains (volume measure) of black powder, but i've seen some guides saying to only use 20 - 40 grains. Anyone got any experience with this? I wanna make some fun flares, smokes, and chalk rounds without overdoing it and blowing my launcher up.

Can any guys who have a bit of info throw it my way?

Old 06-17-2014, 02:47 PM
Tackleberry41 Tackleberry41 is offline
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Unfortunately none of the loading info works on the reloadable shells site for some reason.

A friend has one of these things, load data he has is same OP linked to 80gr of BP or substitute. A bit odd, usually they will have different load data for BP then something like 777, usually less powder for the substitute. One issue you run into with BP is your generally not supposed to have any air space between your charge and projectile. It is slightly different for BP vs substitutes. BP is usually given a little compression, where substitutes just no air space.

With the shells like my friend has you dont have an option of using less BP, since the spacer for the shell is made to hold 80gr, less than that would obviously leave an air space. Only way to use less powder would be a different spacer.
Old 06-20-2014, 08:41 AM
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be careful not to load any anti personnel rounds, and pay attention to the payloads you do make. You can end up with an unregistered Destructive Device and the ATF does frown on that.

37mm is awesome, there is a lot of interesting applications for it just have to be careful and use a quality launcher.

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