I also use a lot of Red Dot powder especially in loading 30 Luger ammo. During the "quest for reliability" for this Luger, I tried powders from fast(Bullseye/Red Dot) to medium(Unique/Power Pistol) to slow(Blue Dot) and it wasn't happy with any of them. I varied the bullet profile and type, along with OAL. I also tried Fiocchi and Winchester factory in it with no success.
These old Lugers can really be a challenge, but once you find the "formula", all of the hard work and frustration is worth it......almost.
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