January 9, 2010.

posted Feb 25, 2011, 6:07 AM by Peter Lucas

Tests using Pedersoli Two were fired with 2 unlubed felt wads over the powder and 1 cardboard over the shot wad.   1 1/8 oz of 9's and 3 drams of pyrodex.  Testing was conducted with Improved Cylinder tubes using Pedersoli Two at 20 yards.  Two strings were fired.  The first string used felt wads with a paper cover. The shots listed as 9A and 10A were fired at the end of the testing and were actually shots 17 and 16. The numbers were reversed in order to have the right barrel correspond to the odd number. The results were as follows:


 Pellets in 10 inch at 20 yardsPellets in 20 inch at 20 yardsPellets in 30 inch at 20 yardsTotal pellets in 30 inch at 20 yardsPercent pellets in 10 inch at 40 yardsPercent pellets in 20 inch at 40 yardsPercent pellets in 30 inch at 40 yardsTotal percent in 30 inch at 40 yardsnotes
Load 1224344114682924.43063.4 
Load 22683711307699.726.928.665.2 
Load 32822636360813.724.922.661.2 
Load 42353751357458.823.427.659.8 
Load 5922591965473.39.316.729.3Dough nut hole
Load 62253821007079.325.63064.9 
Load 72363321547229.32324.256.5 
Load 8522522835871.95.212.719.8Dough nut hole
Load 9A2474011097577.925.93265.8 
Load 10A26036712675310.325.328.263.8 
 212.1334.6141687.78.3221.3925.2654.97 

    When the two shots which produced doughnut hole patterns are removed from the sample, the results are very consistent with 40 yard pattern percentages of 63, 65, 61, 59, 64, 56, 65, 63 and 54.  The average of these shots is approximately 63% which is slightly more dense than the standard modified choke.  The averages for the shots without the doughnut hole were as follows:

 Pellets in 10 inch at 20 yardsPellets in 20 inch at 20 yardsPellets in 30 inch at 20 yardsTotal pellets in 30 inch at 20 yardsPercent pellets in 10 inch at 40 yardsPercent pellets in 20 inch at 40 yardsPercent pellets in 30 inch at 40 yardsTotal percent in 30 inch at 40 yards
 
Average

24735411671810%25%28%63%

    I was not able to determine what caused the doughnut hole patterns.  The first occurrence was at shot 3 from the right barrel and shot 4 from the left barrel.  Since this string was fired with pyrodex, fowling should not have been a significant factor with only 3 or 4 shots being fired from the barrels. 


    The barrels were cleaned and testing continued with non-paper backed wads.  The results follows.  As can be seen 2 of the four test shots had doughnut holes and testing was discontinued at that point.

 Pellets in 10 inch at 20 yardsPellets in 20 inch at 20 yardsPellets in 30 inch at 20 yardsTotal pellets in 30 inch at 20 yardsPercent pellets in 10 inch at 40 yardsPercent pellets in 20 inch at 40 yardsPercent pellets in 30 inch at 40 yardsTotal percent in 30 inch at 40 yardsnotes
Load 91773811066646182550 
Load 1025134816176010252358 
Load 1184241235560291527Dough nut hole
Load 121382511545435141938Dough nut hole
Average1633051646326162143 
Average loads 9 & 102143651347128222454 

    In addition to the increased doughnut hole problem, density also suffered for the shots were a normal pellet distribution was achieved as compared to the paper backed wads. 

 
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