Bro. Buzz - not ducking an answer, but needed my lunch dose of Finley
As a victim of a State of Missouri public education, here's the non-deep thinking version.
1.Recoil is measured per Paul's formula and
http://www.handloads.com/calc/recoil.asp 2. Perceived or 'felt' recoil is almost impossible to define. Good science is reproducible and measurable and there is no 'pain-o-meter' because pain is entirely subjective. One can measure the difference in perceived pain OF an individual but not BETWEEN individuals. One person may rate the recoil of the same shell and gun as a 7 and the next a 4.
And perceived pain is highly variable and dependent on multiple external and internal physiologic factors ie. pain seems worse at night when there are fewer external stimuli. One's assessment of recoil when shooting a record Kudu vs.sighting in the .375 is entirely different. 'Felt' recoil may differ based on too much coffee that morning or too much alcohol the night before, fatigue, sleep (and other human needs
) deprivation, stress, or anxiety. And stock design/gun fit/muzzle jump contribute significantly.
3. 12g loads with more shot/more powder/more fps have BOTH more pressure AND more recoil, but are unrelated.
12 gauge 7/8 oz. at 1280 fps 7.5 pound shotgun = 12.7 ft/lbs of free recoil
12 gauge 1 oz. at 1180 fps, (2 3/4 Dram) 7.5 pound shotgun = 17.3 ft/lbs of free recoil
12 gauge 1 1/8 oz. at 1200 fps, (3 Dram) 7.5 pound shotgun = 23.0 ft/lbs of free recoil
3 Dr. Eq. 1 1/8 oz. Winchester Trap Load at 1,202 fps - 9,600 psi
AA Xtra-Lite 1 oz WAAL12 at 1189 fps - 8000 psi
AA 'Low noise Low recoil' 15/16 oz. at 980 fps - 6,200 psi
4. Loads through a smaller tube have more pressure. A 1/2 ounce .410 load at 1200 fps has a higher pressure than a 7/8 oz. 12g load at 1200 fps; but in a gun with the same weight, much less recoil.
5. Recoil pads absorb foot-pounds of energy and lengthen the duration of recoil, thereby diminshing perceived recoil.
6. The movement of the bolt against the spring in autoloaders does the same thing.
7. Compression of the base wad in the B&P Gordon System hull is suppose to do the same thing.
8. 'Slow burning' powder is suppose to lengthen duration of recoil.
9. Leo probably 'feels' less recoil, and moves alot less in response, than pencil neck geeks like myself. Same force however.
BTW: I frequently flinch trying to 'click' my mouse, but haven't resorted to a "release mouse" yet
"Flinch", "yips" in golfers, and a host of other movement disorders are now classified as a 'Task Specific Dystonia'
http://www.wemove.org/dys/dys_flimb.html http://www.imakenews.com/wemovenews/e_article000394359.cfm?x=b11,0,w
The problem has ended the careers of some professional golfers and musicians. Aynsley Smith PhD, Director of Sports Pyschology and Sports Medicine Research at the Mayo Clinic, Rochester, and Dr. Charles Adler of the Mayo Clinic, Scottsdale have researched the problem extensively
http://www.radiology.medscape.com/viewarticle/411176 Michael Keyes, M.D. discussed the 'Yips' on p. 28 of the Sept. 05'
Shotguns Sports