Being cheap,I use another way to find out if the load is accurate or not;I know I can shoot handheld aprox 4'' at 25 yds.If the group of a new load(or from a new batch of bullets)prints larger than that,I stash the gun and ammo away,get my model 17 with Blazer or Win T22 and shoot with it.If my group gets back in the normal 4'' or less,I know my load doesn't cut it.If it is all over the paper,I know the trouble on that day is on the driver's seat!
But if I wouldn't be cheap,I'd probably get one too.
Qc