I tested a case of the 7/8 20 ga Rio against RST. I found the Rio burnt very clean but at 1250 vs 1125 had noticeably more kick. An old engineering calculation is Energy= 1/2 Mass x Velocity squared. That puts the Rio 23.4% higher in energy. That may not directly correlate to kick but I could feel the difference. I am sticking with RST.
David
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