Keeping your size - Lyman Case Head Space Gauge .300 Winchester Short Magnum

This case gauge works great,it's well made and affordable. I use these gauges when I size cases for my semi-auto rifles. The 300 WSM can be stubborn to size anyway,when ran through a semi-auto they can be hateful when sizing. Between the small base sizing die and this case gauge sizing is much easier to keep uniform cases. I use this combination to size all semi-auto loadings.