Hi Doc06:
This is not exactly what you asked for but in one volume of Burrards 3 volume set he listed the results after he pressure tested several different English manufacturer's shells . I know he did it for 12, 16, and 20 and he may have done it for 28 and 10. He did it for different hull lengths. He gave low, high, and average values. The tests would appear to be done in the early 20s. He didn't state the results were in LUP (lead units of pressure) but I assume they were. In another section he gave a "curve fit" to convert LUP to actual PSI.
I was looking for what I think you are asking for for American guns. What average pressure shell was my 1920s manufacture English 16 gauge gun "designed" to shoot day in and day out - not the proof load, not the maximum load but the run of the mill every-day load.
I used the results from Burrard's test to decide what loads I shoot in my old British, old American, and old German guns. I have two of the books loaned out to my buddy Guion but I will post the tests, the book dates, and the conversion formula when I get them back or perhaps someone else on the board would be kind enough to post them.
Thanks!
Mike
Last edited by AmarilloMike; 12/29/06 02:05 PM.
