The rest is a homemade model but quite sturdy, I use it to zero my centrefire rifles also.
I also would like to test the rifle at 100 meters but I want a good grouping first. I will first play with different primers, we had a good time yesterday shooting rifle and pistol powders at different loads from the rifle. You can hear the difference between the 2 types easily.
A friend of mine is using pistol-grade powder(FFFg?) in his rifle, rifle-grade doesn't produce any food groups.