http://www.brownells.com/aspx/NS/store/ProductDetail.aspx?p=12736&title=SHOTGUN%20BORE%20GAUGE

At Brownell's site, the universal Skeet's tool costs a nickel more than two separate tools (in the dial version; digital also available at much higher price). Per Brownell's listing, the universal will measure 10-12-16-20-28 gauges, while the two separate tools omit the 10 gauge; I assume it's just a matter of finding the correct gauge setting ring to do 10's with the universal tool. Apparently, neither will measure a .410, and I have not been able to find a set of internal dial calipers that will reach into the bore of a .410.

So, what do you guys use for .410s, other than the CSP gauge from Brownell's ($826 in the universal dial set) or the Galazan gauge? The BoreMaster is interesting, but at that price ($260) I want a probe longer than 6".