Ltsheets - that's a mild and accurate load you've got there.
I don't use my .300 WSM much, but with book loads, it's a 210 Berger VLD out the 24" barrel at 2810 fps, with very good accuracy. I like the cartridge!
Seems to me that you've got plenty of room for more powder/velocity with your rifle & load.
The only VLD's I've shot game with were the 115 Berger VLD's at nearly 3200 fps from my 25-06, with Retumbo. That load was very effective! Three mule deer, no problems at about 175, 230 and 400 yards.
Regards, Guy