doublegunshop.com - home Forums General Discussion DoubleGun BBS @ doublegunshop.com anyone use th e"Shotgun COmbo Gauge?"

Thanks Montana. That's what I wanted to know. Accurate consistent quick readings of both barrel wall thickness and bore diameter.

I have 14 barrels measured by Keith Kearcher. If measurements 6" from the muzzle are that much different then the ones he measured 9" in I can always send it back.

Larry

HUH?

The Roberts gauge does the work of both a "bore gauge" and a "tuning fork wall thickness gauge" but only to the depth limited by its size. I compared to both. I also compared to the Galazan (and others') apparatus which has "poles" affixed upright in a base and a gauge mounted to measure wall thickness. This latter device is the one with which we concluded familiarity helped reduce inconsistent readings. I suppose the same is true with the tuning fork set up although the people using it had pretty much overcome its deficiencies for their purposes. (That is, more of the people playing around with the tools had used the tuning forks wall thickness gauges and regular bore gauges more than they had used the table top wall thickness gauge. One fellow had a gauge that looked something like a pencil compass.) Hope this clarifies.

The table mounted Galazan apparatus is not a bore gauge. As a wall thickness gauge, it is infinitely more user friendly than the Clymer tuning fork, which is also "not a bore gauge". I disagree with your statement that most users have overcome the deficiencies of the tuning fork. In contrast, I could easily teach a child to use the table mounted Galazan wall thickness gauge.

I didn't say "most users" in the same way you are. I'm talking about a discrete group comparing their usual portable tools to the Roberts item.

I thought I clarified the two functions. The confusion in the parenthetical statement has been corrected to better convey this.

OK, I'll synopsize without trying to explain the technical aspects of the tools the Robert Louis gauge is attempting to compete with or replace. My synopsis is; The Robert Louis gauge works. It has been demonstrated to me by the makers several times. The makers are really nice guys, very professional, and are "like minded individuals". They are talented engineers who manufacture other items also. We all need to own bore measuring devices and Robert Louis makes one of these devices. The company has generously sponsored shooting events that I have been affiliated with. I like them and I like their products.

Any reason they couldn't make a 9 inch version Seems that would be more useful.

The longer the arms, the more the error on wall thickness.

THanks for the comments on the Combo gauge. It sounds like it will do what I am wanting it to do.

I have no intrest in their bore gauges that also got mentioned. If I were to get set up to measure bores in th eshop, I would use the Galazan product. But I have no intention of getting set up to blue print bores

I think we are still confused about which is which. The Galazan bore micrometer is very simple and portable, sells for about $129.00 and a near identical item is sold by Brownell's for about $90.00. It goes up the barrel at least 15 inches. The Galazan wall thickness gauge is a $400.00 plus item and sits on a table and does not measure bores. The shortcoming of the Galazan bore micrometer is that it will only measure 10-16 in one size, and 20 and 28 in another. The Louis gauge does all sizes.