i can't find loads in 22/250 for berger 80gn vld. is retumbo any good as its devastating in my 7mm rm but that would be too easy wouldn't it.next choice is bm8208 as its also premium and temp stable or bm2 i used previously.kreiger palma 1 in 8"twist .224 is the new barrel.how long should it be cut to? many thanks mike