Thanks for the legitimate answer, but I am not wholly satisfied. If thicker barrels move the point of balance forward, would it not be a simple matter to change the barrel length and maintain centre point?
Fit and Finish points are all agreed, but when you compare a gun that retailed for $500 in 1920 you're talking about something that would retail for $5-7000 today. Are you comparing apples to apples? What about modern premium guns? Are they not comparable?
Is an AH Fox made today, not comparable to one made earlier handling wise?
Drvrage, thanks for your interest. I don't blame you for not being wholly satisfied, as I said, my answer was hasty and incomplete. Let me see if I can elaborate.
Firstly, I would like to say that in my opinion it only makes sense to compare guns with barrels of equal length. If you want to shorten a thick walled barrel to achieve the same balance point as a longer thin walled barrel, what happens when we compare it to a thin walled barrel of the same (shorter) length? Where do we stop? Apples to apples, so to speak.
However, if you want to compare two different lengths:
While it is true that you could shorten the barrel length of a thick walled set to achieve a similar
balance point when compared to a thin walled set, the
distribution of mass for the gun as a whole will not be the same. You will still have a greater percentage of the total mass distributed further from the centre of the gun, rather than being concentrated in the middle.
Think of a steeply sloped sine wave versus a gently sloped one. The area under the curve will be of greater length on the gently sloped one. This area represents the distribution of mass along the gun's length. The steeper the slope, the more the mass is concentrated between your hands. By changing the slope of the curve, you change the handling of the gun, even if the balance point remains the same. This is the reason why formula cars are mid engined - by keeping the majority of the total mass as close to the centre of the car as possible, it makes it easier to turn.
Fortunately it is possible to quantify the handling of a shotgun by using a formula. The formula is:
Result = 0.34*(weight in lbs) + 0.07*(inches from front trigger to balance point) + 0.12*(length of pull) - 0.06*(bore diameter in inches) + 0.04*(barrel length in inches) - 0.03(if it is a sidelock, else 0) + 0.04(if it is a single barrel gun else 0) - 4.05
All that is necessary to use the formula is an accurate scale, a tape measure and an improvised fulcrum to determine the balance point. One may use nominal bore diameters if the precise bore diameter is not known. Measure to the balance point from the aft-most point of the curve of the trigger.
You will find that if you input identical (realistic) numbers except for the barrel length, you will not get the same result. You will also find that in the real world it is virtually impossible to find two guns of identical bore, weight and balance point - I've measured many. Hence, my second paragraph.
To address your other concerns:
A Webley & Scott boxlock in 1920 did not cost $500, it was BPS 18, or about $100. That doesn't matter though. What matters is what you can buy today for your dollars. If you have $3,000 to spend today, you can buy a current mass production SxS or an older hand made one. The trade offs in such a decision have been pointed out.
Can modern guns match the quality of the ones of older manufacture? Purdey will tell you yes. I don't think so. In my opinion, the best quality of workmanship was between about 1890 to 1920. The economics of this period supported high quality hand workmanship and there was a large labour pool of qualified tradesmen. At the same time there was better quality steel available than there had been in the past. After WW I the economics of mass production started to dictate a gradual reduction in the amount of time spent producing a gun. That time amounts to the finesse required to get the gun exactly right, both in terms of balance and finish.
In any case, any modern gun having anywhere near the quality of fit and finish of a quality older gun is priced well out of the "mass market".
In the case of the Fox, the lowest grade available from CSMC today (CE grade) will cost you in excess of $20,000 CDN. Does it compare in quality, handling and finish with a Philadelphia Fox? Yes, generally, although the one example I have held did not have the wood - to - metal fit that I would have expected. However, you can buy a CE grade Philly Fox in restored or minty original condition for considerably less than $20K. I would also like to point out that unlike Henry I do not consider the Fox as having exemplary handling qualities. The aforementioned Webley & Scott boxlock is a livelier gun, IMHO.
If we look at newer, more affordable guns such as the Ruger Gold Label, Franchi Highlander or Fabarm Classic Lion we find very good guns - reliable, well regulated and generally well made. None of them have the feel and balance of the Webley, never mind a higher quality gun. The Ruger, with its thin walled barrels comes close, but is fairly horrible in the fit and finish department. These compromises are dictated by modern economics, and as a trade off you do get steel shot capabilities, replaceable choke tubes and perhaps chrome lined barrels. Not all is bad news, some things do improve. Unfortunately handling, fit and finish isn't one of them.
Sharptail