BlkHawk73 said:
My suggestion...call (don't e-mail) the ammo manufacturer and see what they say. Follow that up with a call to Ruger. Have pen/paper handy to get names and what they say.
Definitely take names, have a pen and paper when you are on the phone and take the BEST NOTES YOU CAN and re-write them in complete sentences immediately after. If Sellier and Bellot start to drag their feet, or Ruger, who you talked to, what you said and what they said and when they said it is very important.
Keep both the contemporaneous record and the recalled notes, both.
Recording the phone conversation is usually not a good idea, tempting as it is, don't do it.. Sometimes illegal, inadmissable and often has a chilling effect on the conversation.
Recording
only YOUR SIDE of the conversation is always OK, though. (My legal advice, however, is NOT always ok.)
Preserve the remaining rounds from the box containing the round that broke your revolver. Note the lot number.
If you feel like doing some investigating on your own, buy another box of S&B, same lot if you can find it. Weight a few of the loaded cartridges and see what the variation is. Compare their weights with the weights of the cartridges from your original (offending) box. If your original box has a few rounds that are heavier than the others, that might be normal variation in bullet weight, but it might indicate overcharged cartridges. Shake'em to see if you think they might be fuller than the others. Whether you open them up and weight the powder inside is up to you.
However, the new box of cartridges you bought are much more available for investigation. If you see a similar variation in cartridge weight, pull the bullets and weight the powder to see what kind of variation they have. If you find a double charge, you really have evidence of S&B responsibility for the damage.
Thanks for asking our advice. Sorry about your gun. Glad you are uninjured. Good luck.
Lost Sheep.