I have chambered several Savage barrels in 20 Vartarg. As a matter of fact it's my favorite cartridge for shooting ground squirrels . I find that the 32gr bullets are ideal because of the limited case capacity and a 1-12 twist is what you want. I did a couple of Lilja 3 groove 1-12 twist a while back and they are superb. The Vartarg has lot of great things going for it. Its economical to shoot as your only using 18 to 20 grains of powder, has excellent barrel life, and you can still get 3700-3800 FPS velocity. The problems are, 1. crappy Remington brass. 2. If you want a repeater you will have a hard time getting it to feed. I just drop in the SSS single shot follower and call it good.