The Federal ammunition looks to have been announced in Jan 2009 but nobody has seen any yet. You might get an adjustable gas valve for your Garandicon. This would allow adjusting the gas system but wouldn't make up for over sensitive primers. The two popular ones are the Mc Cann and the Schuster. The Mc Cann seeems most recommended for using commercial ammunition and the Schuster is for finer adjustments for fine tuning the gas system for accuracy. The idea is to start with the largest gas bleed and step down in gas bleed size until the action cycles. I have never used them as I handload. Years ago people used to drill out the gas plug but the steel is very hard and the required drill bit is very small.