Shooting 130 gr SGK in my 270 I have shot 3 deer in the last couple years. Two of them were less than 100 yds and one was around 150. The 2 under 100 yds were recovered BUT there was no exit wound and inside the bullet had exploded!... The third was never recovered though we blood trailed him for over a mile. I have now switched to cup/core bullets or just recently got some Nosler partitions. Good luck with your search for the perfect bullet for you.
The SGK is a cup and core bullet, but the bullet jacket (the cup) is thinner than most, and the lead core is softer than most..... it is a fragile boat tailed bullet designed to ensure expansion at longer ranges, much like Berger's VLD, just not as efficient, nor as expensive .....
If you want exit wounds on deer at under 150 yards with a .270WIN at max muzzle velocity, the a 130gr SGK is not what you are looking for. Either use the 150gr SGK at around 2900 f/sec (can still "explode" at under 50 yards on a frontal shot, but I get 2" exit holes on close broadside shots-mable the bullet does come apart, I dunno.... but all the parts exit) or pick a tougher bullet .....