The other thing I believe you mentioned was the temperture of H380 can get quite high increasing the erosion of the leades. Another good reason to change. I have H4895, perhaps that is better. Where does one find the temperture of specific powders? All my rifles are vintage hard to replace items and they need to live almost indefinetely. They aren't really of huge value to other folk, just sentimental to me.
Alot of folk like to use a specific powder for each cartridge and I can see how that works better. Having said that it would be nice to feed the pigs with one fat keg. RL15 I have not tried in a few years but it seems pretty versatile. And as you mentioned meters much easier than all the IMR variants I have tried.
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