Ok, Ok, I know. You’re sick of hearing about yet another miracle gun cleaning, lubing and rust preventing product.

Addendum, Saturday 7:30PM

The wadder is now spanking clean and gorgeous. It hasn’t looked this good in years.

One pass, fourteen fail and 985 to go.

So far.

But they say they’re like Accidental Discharges: If you haven’t had one yet, just wait.

A little math can get you in the ballpark very quickly.

I travel a lot and keeping up my Bullseye practice is challenging. I’ve shot the matches at home that I could, shot a few on the road by taking my guns along as baggage, and many of you have very generously let me shoot your guns and your ammo, and then you’ve done the cleaning.

Here’s a shield you can use in competition to keep your competitor’s brass from hitting you in the face or dropping down your shirt.

This is the last of a five part series on tolerances in reloading.

This is the fourth of a five part series on tolerances in ammunition reloading.

This is the third of a five part series.

In this part we look at Cartridge Overall Length (COL) and crimp to discover what tolerance is recommended and whether or not we can get accurate measurements with the available instruments.