I use both the 145 and 160 grain Speer Grand Slam in my 1885 Browning Single shot in 7Mag. The 130 Grand slam in my .270 is very accurate, but the 7 Mag is where the GS really is accurate. The 145 loaded with max charge of IMR 4350 shoots .5 MOA all day long. The 160 is almost as good. I used the 160 and that single shot to take a west Texas mule deer at 603 yards. He dropped like he had been pole axed. I haven't noticed any difference between the old version and the new version when performing on game. Axis deer and whitetails still get killed.
I've been loading the new 145's primarily for my 7 Mag, but I still have a yellow box of the old 160's sitting on my loading bench. I may use them again one day.
