Elizabeth makes a good point. Although I sense that the RCA's on a number of Bryston components I have owned seem slightly smaller, I've never had to crimp my RCAs- tried once and found it very difficult to do properly.
But the size of RCAs on cables and equipment seem to vary fairly significantly in my experience. I became so frustrated with the situation that I now use only locking RCA's of excellent quality ( Silver Sonic Air Matrix with Ultimate RCA's) and a 1 metre cable costs less than than $200. I have also used locking WBT's.