135g FB bullets (BIB, Chism, T&T and a few more) have been around in HBR for years, in fact, they are out of the norm or desire now, with 117g bullets used in the 1:17 twist barrels. The 135g was great in the days of 1:15 twist barrels, I still have a few thousand 125g and 135g FB for my 1:15 HBR rifle that I have not shot since May of 2004.
41.5g N135 with 135g Chism FB won me a ton of medals back in my HBR days.
I shot 1000 yd FClass now so these light bullets are gathering dust LOL