Bump gauge vs comparators…vs homemade bump gauge
I am just starting to get on my bench and learn to reload .223
I typically tend to put the cart before the horse, and being new to reloading I thought it would be smart to get multiple instruments for measuring. I think I’m just overthinking things and confusing myself, but hoping someone will set me straight.
I bought a Sinclair bump gauge, the hornady headspace comparator, and made my own bump gauge with an old case.
When setting up my full length die to set the shoulder bump: The hornady and homemade gauge will produce the same measurements every time, but the Sinclair will show a different measurement. I.E the Sinclair gauge will show .0095 in bump while the other two only show .0045 in shoulder bump.
Is the Sinclair gauge I have maybe out of spec? Or am I using these gauges incorrectly?