My loads is 2% over the max charge listed in the Speer #12 manual (which is 50gr) with WW 748 using Magtech #9.5 LR primers in Winchester cases, COL 2.43". Formerly I used CCI BR-2 primers but I can not notice any difference with using the Magtech in this load. This is over max according to the manuals I have checked, but I have no pressure signs. When sighted in at 200 yards the 130TTSX is -3.7 at 300 yards the 150 is -5.6, which makes these loads versatile and interchangeable past 300 yards in this gun. I am working up loads in nickel cases and expect I can duplicate this, if so I will switch to nickel cases for the 150's so it is easier to tell the two loads apart at a glace and without the need to look at the head stamp or bullet seating (the 150gr is seated out further than the factory 130 which is only COL 2.71).