Some where I read that it was easy to convert 284 WIN to 7.5 SR. Is this true? Using a SR shell holder I stuck a 284 case in my SR di. Took awhile but I did manage to find my stuck case remover tool. Will use the 384 shell holder to expand necks to SR diameter. Is there anything else I should be aware of? I do have proper sized Berdan primers but they are a real pain to remove with water in the case. Don' mind Berdan primers for hunting loads but want to use Boxer primers for target/plinking loads. Any and all advise is welcome.