Boomer said:Perhaps, but I've got 500 .375 Ultra cases, and at any one time 350 - 400 are loaded in a variety of bullet weights and styles. The cost of doing this with a .416 Rigby is beyond my reach. Neither did I find that the Norma brass would last much more that 5 loadings, by which time the primer pockets had expanded. Because I was carrying my rifle almost every day, year round, the chances of loosing a cartridge here and there was always present. I am much happier with the cost of Ultra brass.
Boomer,
There is quite a difference between the Rigby at 40,000 PSI and most everything including your Ultramags at 60,000 plus. I'm not loading .416 Weatherby level loads though, then all bets would be off on case life. As it is the primer pockets are as tight as the day they were new. The only cases that I lose are cartridge collectors at the range asking for a sample.
On an unrelated note what barrel life is expected out of the .375 Ultra? It's only taken 14 months and 1700 rounds to shoot .120" out of the throat of my little H&H. At the current rate I'd estimate that that pipe is 2/3s of the way to being a jack handle or tomato stake. That doesn't bother me much, as barrels are cheap and I have a spare .375 now.