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is the base dimension the same?I've been shooting and reloading for this round since 1983. Tens of thousands of rounds fired (it's my favorite cartridge) through target and hunting rifles. Lapua brass was mostly used.
When blue box came out I tested it against my older stuff and found zero difference. I got the same amount of reloads with indiscernible differences in accuracy.
My 2 pennies
I'm not sure about other cartridges, but to my understanding gold box 6br brass compared to blue box 6br brass has some slight difference in neck wall thickness.
also at one point in time I saw a test that showed the 223 blue box had a slightly higher internal volume compared to the gold box 223.
Now we need 284 Win to get back into production.
LAPUA production ETA is Q4 OF 2026 FOR 284 AND 6.5X284 BRASS."seemingly has overcome the huge hiccup that the Ukraine war has caused for many European producers in terms of availability and consistency after a brief period of shortages in late 2022."
Now we need 284 Win to get back into production.
LAPUA production ETA is Q4 OF 2026 FOR 284 AND 6.5X284 BRASS.

 

