Just saw this thread. I bought a chunk of 147 6.5CM factory ammo (well a chunk by European standards). I used about 10 rounds zeroing it at 100 and 200, then used about 50 rounds at varying distances up to 1150 metres.
Are the blow ups still happening? I could probably live with an occasional blow up as the 147s seem very good; I hit that 1150 metre, 1MoA target on the second shot with the first only just a miss. Tikka T3x TAC 1 in 8 twist, they aren't coming out that fast, 2600fps in a new rifle/ new barrel.