There is no way I can ever give better advice than EddieCoyle on reloading stuff, but this bears repeating. If you select powders that will show a double charge easily you will increase the chances of catching one when it happens.
I reload primarily .38/.357, from mousefart CAS .38s through massive .357 flame belchers that can be a handful to control even in my GP-100. The 3 powders I use (TrailBoss, Alliant 2400 and Win296/H110) will *ALL* show a double charge very easily - by spilling powder all over.
I am aware of the fact that I don't get as many charges out of them by using these powders, but they do exactly what I want them to do, they will show a double charge every time, and I am of the "A Full Case is a Happy Case" crowd.
I am well aware of all the back-and-forth about whether or not a case with lots of airspace will be likely to have issues, belief or disbelief in "Flashover", issues or non-issues with primer-powder contact and all that. While I am not willing to take a stand on any of these it is my belief that the absolute minimum airspace in a case is the ideal airspace in a case.
"But dude, I can get 2 or 3 times as many charges out of ($FAVORITE_POWDER) than with those!"
Yep. Have at it, its you gun and your life - just do me a favor please - don't let anyone else shoot them (the best advice when dealing with handloads in any event).
And frankly the cost of powder compared to the availability and cost of new body parts make me err on the side of safety.
More importantly to me is "What powder?"
Yeah I'm curious as to what powder you were using as well? Glad you're okay though!
Pistol calibers, I check every ~10th charged case for the charge weight and haven't had any issues yet. I also look into every single case I load before putting the bullet in.
But with rifle (only 30-06 so far) I can't bring myself to NOT weigh EVERY charge even though the Lee perfect powder measure works very well with stick powders like Varget and IMR-4064.
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