Brand new to the forum. Noticed that there was limited discussion of the Federal 124 gr HST with some mixed reports. I have just bought an R9 - after waiting years for a used one to appear on the market in MA - and have been feeding it with this ammo exclusively so far. For what its worth, no failures of any kind whatsoever. Am on the lookout for the 147 gr HST and will report on results if and when I get any.