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>tfw receiving 20lbs of 1/2" (12.7m) steel balls in the mail today
I've been slinging marbles all week, just to get my slingshots and bands sorted. The marbles are larger than the steel balls, but much lighter. The difference between them is quite profound. I spent an hour shooting into a makeshift catchbox and only lost 2 balls.
I have a long ways to go to get back into hunting, but and hour a day practice should get me there. though, I may make a couple more slingshots to get details down and aiming easier.